Got Nature? Blog

Purdue Landscape Report: Spring is finally here! Everywhere you look, one can find some spring color around. Some of the first plants to peek out of the ground are spring-flowering bulbs like crocus, daffodil and tulip.  But there are some beautiful spring time shrubs that are Indiana native plants you can add to your yard to be the first in the neighborhood with spring interest. Below, you’ll find a top 10 list of spring-flowering shrubs (in order of flower appearance).

Witch-hazel (Hamamelis x intermedia) Perhaps even earlier-flowering than Forsythia, is ‘Arnold Promise’ witch-hazel. This shrub can flower starting in late winter (unless we have unusually cold winter weather like polar vortices) and keep going all the way into spring. Bright flowers are yellow with red tinges, though there are red-flowering cultivars available. Witch-hazel can be grown as a shrub or a small tree and offers some yellow/orange/red fall color. It’s native!

Forsythia (Forsythia x intermedia) Forsythia is the traditional first-flowering plant in the spring. Hardy plants, their bright yellow blooms can catch your eye anywhere. There are new cultivars out.

Quince (Chaenomeles speciosa) In mid spring, you’ll find these shrubs covered with flowers. There are several cultivars and you may see white-flowering plants (‘Jet Trails’), red-flowering plants (‘Texas Scarlet’) or even large, double, fluffy, peach-pink flowers (‘Cameo’). After the show, this plant tends to fade into the background, but it’s a great native addition.

Koreanspice Viburnum (Viburnum carlesii) Koreanspice viburnum blooms in late April with blooms that are pink/red while they are still in buds, opening to white flowers that are each a half inch wide. The flowers are presented on dense 2-3 inch groupings called cymes (semi-snowball) and very pleasantly fragrant. And luck of all luck, they have nice, clean leaves in the summer and great fall color. Can’t beat that in a multi-season shrub.

Flowering Almond (Prunus glandulosa) Here’s a small plant that grows well in full sun and its lovely. Flowering almond, particularly the cultivar ‘Rosea Plena’ has tons of pink flowers (double—lots of petals). Some cultivars have white flowers, and all present in mid to late spring.

Shadblow Serviceberry (Amelanchier canadensis) A multi-season-interest plant, serviceberry offers white flowers on 2-3 inch long inflorescences in April, which leads to sweet, juicy black fruit in the summer. Some plants can also have decent fall color (yellow with hints of orange and red). Serviceberry grows by suckering so it’s perhaps not a great choice for a small yard.

Lilac (Syringa vulgaris). The beautiful purple flowers (many, many colors are available, but purple is most common) are wonderfully fragrant in most of spring. They may only bloom for 2 weeks, but man those 2 weeks are worth having a lilac in your garden! Takes me straight back to my childhood.

 Black Chokeberry (Aronia melanocarpa) An adaptable species, this plant is known for long-lasting black fruit in the fall and wine-red fall color. Spring flowers are white, presented in groups of 9-20 resulting in 1 to 1.5 inch groupings covering the plant in May. This species can spread and colonize large areas, which makes for a striking mass effect in the spring. Small plant (under 5 feet) thrives in part shade to full sun.

Mockorange (Philadelphus coronarius) Fans of mockorange are serious about their use in the landscape. These plants can take care of themselves and they’ll reward you every May/June with white, fragrant flowers that are 1 to 1.5 inches wide.

Siberian Peashrub (Caragana arborescens) Granted, this is a great shrub for harsh sites (poor soils, drought, alkaline soil, cold, wind), but it’s unusual and doesn’t take much care. Leaves are pea-green and emerge with the yellow flowers in May. Later in the summer the fruit of the flowers, a narrow pod, makes a popping sound when it opens.

Remember, plants with more than one season of interest are like hitting the landscape jackpot. So, if you’ve chosen one of these plants because you love the flowers in the spring, just be aware that it may need to fade into the background for the rest of the year. Having said that, plants that usher in the new season are anticipated, loved and enjoyed. Make sure you’ve got some of these in your neighborhood for a dose of early spring joy.

This was adapted from Horticulture Newsletter – Cheryl Boyer – Kansas Extension. All plants listed in this article are native species of Indiana.

Read the original article posted in the Purdue Landscape Report April 2025 Newsletter: Top 10 Spring Flowering Shrubs.

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Spring Tree Preparations, Purdue Extension Forestry and Natural Resources (FNR) Got Nature? Blog
Celebrate Pollinator Week with Flowers of June Tour, Got Nature? Blog, Purdue Extension – FNR
Tracking the Bloom, Got Nature? Blog, Purdue Extension – FNR
Indiana’s Native Orchids, Indiana Forestry & Woodlands Association (IFWOA) Webinar
Wildflowers and Ferns of Indiana Forests: A Field Guide, Google Books
ID That Tree Spring Bloom Edition: Bladdernut, Got Nature? Blog, Purdue Extension – FNR
ID That Tree, Purdue Extension-FNR YouTube playlist
Alternative Options for Invasive Landscape Plants (pdf), Purdue Extension – Purdue Horticulture and Landscape Architecture
Landscape Uses of Native Plants, Indiana Native Plant Society
Find an Arborist video, Trees are Good-International Society of Arboriculture (ISA)
Tree Installation: Process and Practices, The Education Store, Purdue Extension resource center
Tree Planting Part 1: Choosing a Tree video, Purdue Extension
Tree Wound and Healing, Got Nature? Blog, Purdue Extension – FNR
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Ask an Expert: Tree Selection and Planting, Purdue Extension-FNR YouTube playlist
Recommended Indiana-native Plants for Attracting Pollinators (pdf), Purdue Extension – Entomology
Gardening for Pollinators, Purdue Garden Articles
Subscribe Purdue Extension-FNR YouTube Channel

Amanda Bailey, Extension Educator – Ag and Natural Resources
Purdue Extension – Warrick County

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The Purdue Plant and Pest Diagnostic Laboratory (PPDL) proudly presents its latest Annual Report, offering a comprehensive overview of the year’s most significant insights, diagnostics, and trends. This essential document covers critical topics such as spruce-tordon uptake, hosta virus X, ophiostoma ulmi, diamond back moth, lettuce slime mold, and bentgrass dollar spot. As an indispensable resource for growers, researchers, and the public, PPDL remains at the forefront of providing expert analysis on plant diseases, insect identification, and environmental concerns throughout Indiana and beyond.

Visit the PPDL Annual Reports webpage to find the 2024 report and view past reports.

About PPDL:
The Plant and Pest Diagnostic Laboratory (PPDL) remains dedicated to helping protect Indiana’s agriculture, the green industry, and individual landscapes, by providing rapid and reliable diagnostic services for plant disease and pest problems. PPDL also provides appropriate pest management strategies and diagnostics training. They are a participating member lab in the National Plant Diagnostic Network (NPDN), a consortium of Land Grant University diagnostic laboratories established to help protect our nation’s plant biosecurity infrastructure.

Resources:
Find an Arborist, International Society of Arboriculture
Diseases in Hardwood Tree Plantings, The Education Store, Purdue Extension’s resource center
Fifty Common Trees of Indiana
An Introduction to Trees of Indiana
Shrubs and Woody Vines of Indiana and the Midwest, The Education Store
Tree Installation: Process and Practices, The Education Store
Forest Improvement Handbook, The Education Store
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
ID That Tree, Purdue Extension-FNR YouTube playlist
Tree Defect Identification, The Education Store
Tree Wound and Healing, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources

Purdue Plant & Pest Diagnostic Laboratory (PPDL)
Purdue Botany and Plant Pathology

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Invasive species are any plant, animal, insect or plant disease not native to a specific location that can cause harm to the environment, impact the diversity of native species, reduce wildlife habitat or disrupt important ecosystem functions.

Why should you care about invasive species? Invasive species limit land use, degrade natural resources and inhibit recreational pursuits such as hunting, fishing, bird watching, and foraging. They also negatively impact fisheries, agricultural and forestry industries, destabilize soil and alter water resources. Invasive species also out compete natives and are costly to control with estimates showing that the U.S. spends $137 billion/year to control/manage invasive species.

As spring approaches, many invasive plants will begin to leaf out in woodland areas. Spring is a good time to stop them in their tracks so they don’t overtake native plants, affect water availability or damage the quality of soil among other potential impacts.

Here are some resources to help you identify various invasive plants in woodland areas near you, to know when to report them and also what you can do help control their spread.

Videos on Purdue Extension – Forestry and Natural Resources (FNR) YouTube Channel, Invasive Species Playlist

• Asian Bush Honeysuckle
• Burning Bush
• Callery Pear
• Multiflora Rose
• Invasive Plants Threaten Our Forests Part 1: Invasive Plant Species Identification
• Invasive Plants Threaten Our Forests Part 2: Control and Management

Don’t miss this YouTube Shorts video, Lenny Farlee Talks About Invasive Plants Emerging in Early Spring

More Purdue Extension-FNR YouTube Video Series –
Woodland Management Moment Videos:

• Against Invasives
• Garlic Mustard
• Autumn Olive

Woodland Stewardship for Landowners Videos:

• Common Buckthorn
• Japanese Barberry

ID That Tree Videos:

• Invasive White Mulberry
• Invasive Siberian Elm
• Invasive Tree of Heaven
• Invasive Amur Honeysuckle
• Asian Honeysuckle

FNR Extension Publications, The Education Store:

• Invasive Plant Species: Oriental Bittersweet
• Invasive Plant Species: Wintercreeper
• Japanese Chaff Flower
• Kudzu in Indiana
• Mile-a-minute Vine

Purdue Landscape Report:

• Alternatives to Burning Bush for Fall Color
• Now is the Time to Identify Callery Pear
• Keyword search: Invasive

FNR Extension Got Nature? Blog:

• Woodland Invaders
• Invasive Species: the Good News and the Bad News

When and how do I report an invasive species?
The Purdue Invasive Species website will help you identify invasive species and explain how to send in your findings. If you notice something is killing an otherwise healthy stand of trees or shrubs, you will want to identify it and report it if it is on the invasive list. If you see a plant that is taking over an area where it doesn’t belong, you will want to identify it and report it if it is on the invasive list.

• The GLEDN Phone App – Great Lakes Early Detection Network
• EDDMaps – Early Detection and Distribution Mapping System
• 1-866 No EXOTIC (1-866-663-9684)
• depp@dnr.IN.gov – Email Indiana Department of Natural Resources (DNR)

More Resources
Indiana Department of Natural Resources: Invasive Species
Indiana Invasive Species Council
Cooperative Invasive Species Management Area (CISMA)
Aquatic Invasive Species, Illinois-Indiana Sea Grant (IISG)
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
Emerald Ash Borer Information Network, Purdue University and Partners
What Nurseries Need to Know About the Invasive Species Regulation, The Education Store, Purdue Extension’s resource center
Invasive plants: impact on environment and people, The Education Store, Purdue Extension’s resource center

Diana Evans, Extension and Web Communication Specialist
Purdue University Department of Forestry and Natural Resources

Lenny Farlee, Extension Forester
Hardwood Tree Improvement and Regeneration Center
Purdue Department of Forestry & Natural Resources

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Purdue Extension: We invite you to read our 2024 Annual Impact Report to learn about some of the significant activities that Purdue Extension has led during this past year. We feature some of our most well-known programs, such as Master Gardener, as well as such up-and-coming ventures as Purdue on the Farm. In every story, what you discover and see in action is Extension’s profound commitment to providing diverse opportunities and ongoing support to all Indiana residents and to contributing to our state’s continued growth and stability.

Check out the highlights for the Community Development and the Facilitative Leadership Workshop, along with other Purdue Extension programs:

• Community Development, part of the Workforce Development program, sharing Digital Ready Business
• A Unique Learning Lab: Purdue Extension Facilitative Leadership Workshop
• 4-H Youth Development, Discovery Challenge program with students practicing essential communication skills and building career options
• Purdue Extension’s food as Medicine program, a prescription for better health.
• Purdue on the Farm, links growers and researchers.
• Cultivating Local Leaders

Resources:
Nature of Teaching, Purdue College of Agriculture
Community Development, Purdue Extension
Purdue Extension
Family Programs, Purdue Extension – Health and Human Sciences
Taking Action to Address Substance Use in Communities (TASC), Purdue Extension
Diversified Farming and Food Systems, Purdue Extension
Woodland Stewardship for Landowners, Playlist, Purdue Extension – Forestry and Natural Resources YouTube channel
A Woodland Management Moment, FNR – Ext Playlist
Hardwood Ecosystem Experiment – Wildlife Responses to Timber Harvesting, The Education Store, Purdue Extension resource center
Forest Improvement Handbook, The Education Store
Community Planning, FNR -Ext Playlist

Dan Walker, Community Development regional Educator
Purdue Forestry and Natural Resources/Illinois-Indiana Sea Grant/Purdue Extension

Kara Salazar, Assistant Program Leader for Community Development and Sustainable Communities Extension Specialist
Purdue Forestry and Natural Resources/Illinois-Indiana Sea Grant/Purdue Extension

Purdue Extension

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Once the leaves have fallen and the landscape is dominated by shades of brown and gray, bright colors like red catch our attention. There are several red fruits that we may encounter in the late fall and winter here in Indiana that add some color to the landscape. These fruits are retained on trees and shrubs for a variety of reasons. Some are not as palatable to wildlife, so they are eaten later in the season. Some are more resistant to freeze damage and thus cling to branches longer than delicate fruits. There may also be an advantage to their appearance. Many of these plants have seeds dispersed by wildlife like birds, which eat the seeds and excrete them later, providing an opportunity to produce new plants away from the parent. Many birds can see much of the same color spectrum we do, plus enhanced vision in the ultra-violet bands. Brightly-colored seeds with waxy skins may reflect more ultra-violet light and be more noticeable to the birds.

What are some of those red fruits?
One family of plants accounts for several red fruit we can see in late fall and winter, the rose family. This family includes apples, plums, cherries, hawthorns, pears and others as well as the roses. In Indiana we have several hawthorns (Crataegus species) that produce a fruit resembling a tiny apple. These vary in size by species but are typically ¼ to ½ inch diameter and often held in clusters. Hawthorns are typically small trees and may have long thin thorns on the twigs.

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Join Purdue Extension forester Lenny Farlee and wildlife specialist Brian MacGowan as they help you prepare for the holidays while keeping your family and local wildlife safe. This video discusses everything from how to choose and care for a real Christmas tree as well as what to do with it after the season and also how to make wildlife/nature-friendly decorations.

Topics Include:
– What can I do with my tree after Christmas that would benefit wildlife?
– Are artificial structures legal in Indiana lakes?
– What types of items can I collect from the wild for holiday decorations?
– How do I do it in an environmentally responsible way?
– Are there some things I shouldn’t or can’t collect?
– What outdoor holiday decorations can benefit wildlife?
– How do I make it last longer?
– Can I avoid problems with non-target wildlife?

If you have any questions regarding trees, forest management, wildlife, wood products or other natural resource topics, feel free to contact us by using our Ask an Expert web page.

Resources
Selecting an Indiana-Grown Christmas Tree, The Education Store, Purdue Extension resource center
Tips for First-Time Buyers of Real Christmas Trees, The Education Store
ISDA Indiana Grown Christmas Tree Farm map, Indiana Grown
Indiana Christmas Tree Growers Association
Purdue University Invasive Species resources
Indiana DNR Division of Fish and Wildlife for wildlife possession rules
Feed the birds with a DIY wreath, Audubon
Dan Cassens: Tips for First-Time Christmas Tree Buyers, Video, Purdue Agriculture
Dan Cassens: Starting Your Own Christmas Tree Farm, Video

Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resource

Brian MacGowan, Extension Wildlife Specialist
Department of Forestry & Natural Resources, Purdue University

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Purdue Landscape Report: In the last newsletter, an article on triclopyr brought up much discussion on the Roundup brands now containing multiple active ingredients other than glyphosate. Professionals in the industry may encounter a client with herbicide damage symptoms that mimic growth-regulator injury instead of typical glyphosate damage symptoms. While the client may have used Roundup, they didn’t necessarily use glyphosate. Going forward, it’s important to keep in mind that Roundup no longer means glyphosate in the consumer market.

Roundup has been one of the most used herbicides for many different weed control applications. Roundup, with the active ingredient glyphosate, was first registered with the EPA in 1974. When Roundup went off patent in 2000, glyphosate started being sold under many different names. According to the National Pesticide Information Center there are currently over 750 products containing glyphosate. Formulations may differ with salt carriers, adjuvants, concentrations, and mixed with other herbicides.
Recently, Bayer announced glyphosate would be phased out of consumer Roundup products. In its place, consumer Roundup products include other active ingredients. This can lead to confusion in the consumer market. It’s important to note that professional-use Roundup (turf and ornamental, agronomic crops, etc.) still contains glyphosate.

Within the consumer Roundup product line, there are many different formulations designed for specific purposes, which include Roundup Weed and Grass Killer, Roundup for Lawns, Roundup for Lawns: Crabgrass Destroyer, Roundup Dual Action Weed and Grass Killer, Roundup Poison Ivy and Tough Brush Killer, among others. Each of these products contains distinct active ingredients that target different types of weeds.

Roundup Weed and Grass Killer: Glyphosate as the Active Ingredient
The original Roundup herbicide contains glyphosate as its primary active ingredient. Glyphosate is a systemic, non-selective herbicide, meaning it is absorbed by the plant and translocated throughout the vascular system, ultimately leading to the plant’s death. Glyphosate works by inhibiting the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), which is a key component of the shikimic acid pathway—a pathway critical for the synthesis of aromatic amino acids in plants.

Active Ingredient:

1. Glyphosate: The ‘traditional’ version of Roundup that controls many different weeds. Can take 10-14 days to kill weeds.
2. Pelargonic Acid: A contact herbicide that quickly breaks down cell walls. This is added to provide a quick burndown of the weed.

Roundup Dual Action Weed and Grass Killer Plus 4 Month Preventer: Multiple modes of action
Round Dual Action is a formulation that includes four very different herbicides that is intended for use in areas with limited vegetation (i.e. sidewalks, driveways, mulched beds). In addition to postemergence herbicides, this product includes two preemergence active ingredients.

Active Ingredients:

1. Triclopyr: Systemic herbicide that mimics auxins. Very effective herbicide for woody plants, which is used frequently in invasive species treatments.
2. Fluazifop: Grass-specific herbicide (graminicide) that controls several annual and perennial grasses.
3. Diquat: Contact herbicide that exhibit symptoms rapidly. Good for annual weeds.
4. Imazapic: Pre- and Postemergence control of several grasses and broadleaf weeds.

Roundup for Lawns: A Combination of Selective Herbicides
Roundup for Lawns is a specialized formulation designed for residential use, particularly for controlling broadleaf weeds in lawns. Unlike traditional Roundup, which contains glyphosate, Roundup for Lawns contains a combination of selective herbicides, including MCPA, quinclorac, dicamba, and sulfentrazone. These ingredients are chosen for their ability to target broadleaf weeds and grassy weeds without harming most turfgrass species. This product is similar to the traditional ‘three-way’ herbicides that are commonly used in turf.

Active Ingredients:

1. MCPA: MCPA is a selective herbicide that mimics the action of natural plant hormones known as auxins. When absorbed by broadleaf weeds, it causes uncontrolled growth, leading to the plant’s death.
2. Quinclorac: Quinclorac is effective against grassy weeds, primarily used for crabgrass control in turf. It can be similar to auxin herbicides, causing epinasty, curling, and a change of color.
3. Dicamba: Similar to MCPA, dicamba disrupts the growth of broadleaf weeds by mimicking natural plant hormones.
4. Sulfentrazone: Pre- and postemergence activity in turf. Very effective on nutsedge.

Roundup for Lawns: Crabgrass Destroyer
Roundup for Lawns: Crabgrass Destroyer is a product designed to control grassy weeds and several broadleaf weeds in cool-season turf. In addition to crabgrass, other grassy weeds and some broadleaves can be controlled.

Active Ingredients:

1. Topramezone: Very effective herbicide for several annual and perennial grassy weeds and some common broadleaf weeds.

Roundup Poison Ivy and Tough Brush Killer: Triclopyr for Tough Woody Plants
Roundup Brush Killer is formulated to tackle tough, woody plants, such as brush, brambles, and small trees. The active ingredient in this product is triclopyr, a selective herbicide that targets broadleaf plants with less damage to grasses. This product can be effective on invasive woody plants.

Active Ingredients:

• Triclopyr: Systemic herbicide that mimics auxins. Very effective herbicide for woody plants, which is used frequently in invasive species treatments.
• Glyphosate: The ‘traditional’ version of Roundup that controls many different weeds. Can take 10-14 days to kill weeds.

Conclusion
All of the consumer Roundup products contain unique active ingredients tailored to specific weed control needs. There can be understandable confusion around these products due to the historical uses of glyphosate. The Green Industry needs to be aware of the confusion around these products to better inform their clients. Understanding the active ingredients and mechanisms of action of these herbicides is crucial for their effective and safe use in various settings.

View the original article here: When Roundup Isn’t Roundup: Clearing up the confusion between products

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
Beyond Roundup: Alternatives to consider adding to your weed management plan, Purdue Landscape Report
Diagnosing Herbicide Injury on Garden and Landscape Plants, The Education Store, Purdue Extension’s resource center
Herbicide Injury, Purdue Plant Doctor
Find an Arborist video, Trees are Good-International Society of Arboriculture (ISA)
ID That Tree, Playlist, Purdue Extension – FNR YouTube Channel
Invasive Species Playlist, Playlist, Purdue Extension – FNR YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel (Against Invasives, Garlic Mustard, Autumn Olive)
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel (Common Buckthorn, Japanese Barberry)
Report Invasive Species, Purdue Invasive Species
The GLEDN Phone App – Great Lakes Early Detection Network
EDDMaps – Early Detection and Distribution Mapping System
Episode 11 – Exploring the challenges of Invasive Species, Habitat University-Natural Resource University
What Are Invasive Species and Why Should I Care?, Purdue Extension-FNR Got Nature? Blog
Emerald Ash Borer Information Network, Purdue University and Partners
Aquatic Invasive Species, Illinois-Indiana Sea Grant (IISG)
Invasive plants: impact on environment and people, The Education Store
Subscribe Purdue Extension-Forestry and Natural Resources YouTube Channel

Kyle Daniel, Commercial Landscape and Nursery Crops Extension Specialist
Purdue Horticulture & Landscape Architecture

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Lenny Farlee, sustaining hardwood Extension specialist for Purdue’s Department of Forestry and Natural Resources (FNR), has been named a 2024 Fellow of the Society of American Foresters (SAF). The SAF Fellow Award, one of the highest honors bestowed on an SAF member by their peers, recognizes long-standing service to forestry at the local, state, regional and national levels.

Farlee was honored with the award during the 2024 SAF National Convention, which took place in Loveland, Colorado from Sept. 17-20.

“Being named a Fellow of the Society of American Foresters is particularly meaningful to me since it originates from a nomination by my peers at the state level,” Farlee said. “I am very grateful that my colleagues in forestry here in Indiana considered my service worthy of recognition, and I owe much of the credit to them for their support of me through my career. It has been my privilege to serve the people and the profession as an Extension forester here at Purdue.”

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Weekly Review, Division of Entomology & Plant Pathology, Indiana DNR: Will Drews, Indiana Department of Natural Resources (DNR) Nursery Inspector & Compliance Officer with the DNR Division of Entomology & Pathology shares in September Weekly Review e-newsletter how staff will continue to help coordinate kudzu control throughout the state and expands upon the state funded kudzu control program.

As some of you may know, kudzu (Pueraria montana var. lobata) is an invasive woody vine that can now be found throughout the state of Indiana. It is referred to colloquially as “the vine that ate the south,” and if you took a drive through some southern states (e.g. Tennessee, Georgia, the Carolinas, etc.) right now, you’d see why. Kudzu has tremendous growth potential, sometimes as much as 1 foot per day. Some vines reach lengths of up to 100 feet. Because of this it is a detriment to Indiana’s natural resources, kudzu has been listed as a prohibited invasive plant under the DNR’s Administrative Code as per 312 IAC 18-3-16 Control of kudzu.

While part of the language includes that the landowner “must take efforts to eliminate this species in such a manner as is consistent with federal and state law,” the Division of Entomology & Plant Pathology have been leading a state funded control program where sites are treated on a rotating, priority basis to eradicate or suppress further spread with no cost to the landowner. Over the last month, around 40 kudzu sites in Indiana have been treated and we have seen some great progress from last year.

If you think you have seen a new kudzu population, please send me that information (photos and GPS coordinates or address) at my email address provided below. A couple of the sites treated this year are new reports from last year that we were able to address. With your help, we can try to reduce the impact of this incredibly invasive vine and protect our natural resources.

For more information regarding this invasive vine Kudzu see the Indiana Department of Natural Resources, Division of Entomology & Plant Pathology, Kudzu.

Subscribe: Entomology Weekly Review.

Resources:
Indiana Department of Natural Resources-Division of Entomology & Plant Pathology
Indiana Department of Natural Resources-Natural Resources Conservation Service Plants Profile
Indiana Department of Natural Resources-National Invasive Species Information Center
Indiana Department of Natural Resources-Kudzu Alert & Identification Sheet
Indiana Department of Natural Resources-Kudzu Fact Sheet
Indiana Department of Natural Resources-Kudzu Before & After Treatment Photos
Invasive Species, Playlist, Purdue Extension – FNR YouTube Channel
Report Invasive Species, Purdue Invasive Species
What are invasive species and why should I care?, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Indiana Department of Natural Resources: Invasive Species
Invasive Plant Species Identification, Video, Purdue Extension – FNR Youtube Channel
Mile-a-minute Vine, The Education Store
Invasive Plant Series: Swallow-worts, The Education Store

Will Drews, Nursery Inspector & Compliance Officer, Division of Entomology & Plant Pathology, WDrews@dnr.IN.gov
Indiana Department of Natural Resources (IN DNR)

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Purdue Landscape Report: As summer comes to a close, plants are rapidly releasing seeds and the most noticeable are the flying fluffy type. Thistles, asters and milkweed are just a few of the summer-flowering plants that depend on the wind to disperse their seeds, sometimes carrying them miles away to potentially suitable locations, though seeds typically land within a few meters of the mother plant. This may not be a concern if it’s a desirable plant, but can become extremely problematic when that seed comes from Canada Thistle (Cirsium arvense) (Fig. 1).

Canada thistle is found on the list of Indiana Noxious Weeds (IC 15-16-7-2), which mandates that landowners take necessary steps to control and contain the spread of this highly invasive species. Formal enforcement of this Indiana Code falls to Township Trustees, though weed control is a responsibility that is often overlooked. Landowners and homeowners shouldn’t wait for a notice, or knock at the door, from a Township Trustee to begin controlling Canada thistle. It’s listed as a noxious weed for good reason.

Canada thistle is a perennial plant that can reproduce from seed or rhizomes making it difficult to control and contain. Each plant can produce thousands of wind-blown seeds that may remain viable for up to 20 years in the soil. Rhizomes are horizontal underground stems that can grow several feet and put out new shoots (Fig. 2). To add insult to injury, if a rhizome is cut or tilled, a separate plant may grow from each piece of rhizome.

Mechanical and cultural control options for Canada thistle are limited and may reduce plant density, but are not effective at eradicating large, established populations in a landscape. A new population, without an established root system, may be controlled with frequent mowing to deplete food reserves and prevent seed production.Small, isolated populations may be controlled with hand-pulling, but this will need to be repeated every few weeks.

Chemical control options include pre- and post-emergent herbicides and, in many cases, applications of both types are needed for complete eradication. A pre-emergent herbicide, with an active ingredient of dichlobenil, is effective at preventing seed from germinating, but will not control established plants. A post-emergent herbicide with the active ingredient of clopyralid is the most effective option for home gardeners. Clopyralid is a selective herbicide for broadleaf weeds, but most vegetable and ornamental plants are susceptible. Precautions should be taken to avoid off-target damage. Read and understand the herbicide label before use. The label is the law.

Regardless of the method used, complete control of an established Canada thistle population will take persistence over multiple seasons. If the fluffy seed is beginning to fly from your thistle patch, it will likely take many more seasons to rid the garden of this pest, but it is possible. To win the battle against Canada thistle, it takes serious grit and an effective herbicide, or a good realtor.

View the original article here: What the Fluff?!

Subscribe and receive the newsletter: Purdue Landscape Report Newsletter.

Resources:
ID That Tree, Playlist, Purdue Extension – FNR YouTube Channel
Find an Arborist video, Trees are Good-International Society of Arboriculture (ISA)
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel (Against Invasives, Garlic Mustard, Autumn Olive)
Woodland Stewardship for Landowners, Playlist, Purdue Extension – FNR YouTube Channel (Common Buckthorn, Japanese Barberry)
Planting Your Tree, Video, The Education Store
Tree Installation, The Education Store
Indiana Invasive Species Council
Indiana Department of Natural Resources: Invasive Species
Purdue Extension Pond and Wildlife Management Website
Control of Canada Thistle in CRP and Other Noncrop Acreage, The Ed Store
Invasive Thistles
Report Invasive Species, Purdue Invasive Species
Understanding and Controlling Thistle in the Nursery and Landscape, Purdue Landscape Report
Subscribe – Purdue Extension-FNR YouTube Channel

Karen Mitchell, Consumer Horticulture Extension Specialist
Purdue Horticulture & Landscape Architecture

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