First — let's get the words right
People use "invasive" to mean anything that grows where they didn't put it. That's not right, and it matters, because the fix for a goldenrod that got out of hand is not the same as the fix for English ivy killing your trees. So here are the four words you actually need:
- Native
- Evolved here. Belongs here. The insects and birds in your yard are wired to work with these plants — sometimes they can't survive without them. Protect them.
- Non-native
- Came from somewhere else. Not automatically a problem. Your tomatoes are non-native. Your daylilies are probably non-native. Coming from away doesn't make something an enemy.
- Naturalized
- Non-native, but settled in peacefully. It lives here now without wrecking the place — no aggressive spreading, no crowding out the plants that were here first. Dandelions are naturalized. Annoying maybe. Not the crisis.
- Invasive
- Non-native AND actively causing harm. Crowding out natives, changing the habitat, winning in ways that cost everything else around it. This is the one that needs your attention.
- Aggressive
- Spreads fast and takes over ground — but it can be a native. Goldenrod is Ohio-native, beautiful, important to pollinators — and it will eat your garden bed if you don't manage it. Aggressive isn't invasive. It just means you stay in conversation with it.
Now. Four plants that are invasive in Ohio and most of the Midwest. I fight all four in my own yard. Here's what to know.
The Villains
English Ivy Hedera helix
What it looks like
Shiny, lobed leaves — three to five points — on woody, trailing vines. Dark green, stays green all winter. Climbs anything: fences, walls, trees. On the ground it forms a dense mat that smothers everything underneath. Looks tidy on a brick wall. That's the trap.
Why it's a problem
When ivy climbs a tree it does two things: it adds enormous weight to the canopy, making limbs more likely to fail in a storm, and it blocks light and circulation so the tree slowly weakens. Mature ivy on a tree trunk will kill that tree over years. On the forest floor, it forms an "ivy desert" — so dense that nothing else, no native wildflower, no tree seedling, no ground cover — can get through. Birds don't eat the berries (and the berries are mildly toxic to people and pets).
What to do about it
Cut stems at the base — about knee height — all the way around any tree it's climbed. Let the top die in place; don't rip it down or you'll damage the bark. Then pull or smother what's on the ground. Cardboard and thick wood chip mulch will work on a manageable patch. Big areas may need a targeted herbicide — glyphosate painted directly on cut stems in fall. This is a multi-year job. Plan accordingly.
Multiflora Rose Rosa multiflora
What it looks like
Arching canes with recurved thorns like fish hooks, clusters of small white five-petaled flowers in late spring, and dense thickets that can reach twelve feet high. Small red rosehips in fall. Pretty from a distance. Do not reach into it.
Why it's a problem
This one was actually sold as a "living fence" and planted along roadsides by conservation agencies in the mid-20th century. Then people figured out it doesn't stay where you put it. Birds eat the berries and spread the seeds everywhere — field edges, stream banks, woodland openings. A single plant can produce a million seeds a year. It forms thickets dense enough to block cattle movement and shades out the native wildflowers and shrubs underneath. Once it's established in a fence row, it can be nearly impossible to remove without heavy equipment.
What to do about it
Young plants can be pulled when soil is moist — get the root ball or it sprouts right back. Established plants: cut to the ground, then treat new sprouts as they emerge. Cut-stem treatment with triclopyr in summer is more effective than spraying for mature canes. You will do this more than once. That's the honest answer.
Japanese Honeysuckle Lonicera japonica
What it looks like
Twining woody vine with oval, opposite leaves. White and yellow tubular flowers in late spring and early summer — fragrant, that unmistakable honeysuckle smell. Small black berries. Semi-evergreen, meaning it holds leaves late into fall and leafs out early in spring, which extends the damage window.
Why it's a problem
It twines around saplings and young shrubs and constricts them as it grows — essentially girdling them. It overtops native shrubs and small trees, pulling them down with its weight and blocking their light. It's one of the most widespread invasive vines in Ohio, and it got here partly because people planted it intentionally for erosion control and because it smells wonderful. The smell is a con.
What to do about it
For small infestations, pull by hand in early spring when soil is soft — you need the roots, not just the vine. For established patches, cut at the base and apply triclopyr or glyphosate to the cut ends immediately. Late fall, after frost and before the ground freezes, is the best treatment window — the plant is still actively moving nutrients down into the roots and will carry the herbicide with it. Leave nothing to chance: follow up the next spring on anything that resprouts.
Buckthorn Rhamnus cathartica & Frangula alnus
What it looks like
A shrub or small tree that looks, frankly, like a lot of things. Common buckthorn (Rhamnus cathartica) has small, slightly toothed opposite leaves and ends its branches in a short spine — that's the tell. Glossy buckthorn (Frangula alnus) is spineless, with glossy leaves and bark that shows orange under the outer layer if you scratch it. Both produce small black berries. Both leaf out earlier in spring and hold leaves later in fall than nearly everything around them — if something still looks green in November when the oaks are bare, start suspecting buckthorn.
Why it's a problem
Buckthorn is sneaky. It doesn't make a dramatic thicket like multiflora rose; it just slowly infiltrates and shades out the shrub and ground layer of a woodland. It also produces a chemical compound — emodin — in its roots and leaves that suppresses the germination of other plants. It's not just outcompeting natives; it's actively poisoning the ground for them. Birds eat the berries (which are a strong laxative, by the way) and spread seeds widely. It's one of the hardest invasives to eradicate once established.
What to do about it
Small plants can be pulled or dug, root and all, when the soil is moist. For anything with a trunk diameter over half an inch, cut at the stump and immediately — within minutes — treat the cut surface with a concentrated herbicide (glyphosate or triclopyr). If you cut and walk away, it will resprout from the stump with a vengeance. Late fall is again the best treatment window. Buckthorn is persistent. Budget at least two to three years of follow-up for any serious infestation.
"None of this takes a weekend. I'm not going to lie to you about that. You start this season, you check back next season, you keep going. That's how a yard gets reclaimed."
A word on timing
For most cut-stump treatments, late fall is your best window — after a hard frost, before the ground freezes. The plant is still transporting nutrients down to its roots, and it'll carry the herbicide right along with them. Early spring, before leafout, is second best. High summer is the worst time to treat — growth is at its most vigorous and results will be uneven.
Mark your spots. Take photos before and after. Come back in six weeks and deal with what resprouts. Consistency beats intensity every time with invasive removal.
What to Plant Instead
Every square foot you reclaim from an invasive is a square foot you can give back to something that actually belongs here. Native plants feed the native bees, the native butterflies, the birds passing through. They don't need fertilizer, they don't need watering once they're established, and they don't need you to fight them back every spring.
For a full list of what to put in the ground in Ohio — organized by sun, soil, and who it feeds — head over to Ohio Native Plants — Meemaw's List. Start there. Pick three. Plant them where you just pulled the ivy.
Same principle as building anything that lasts: stop the bleeding first, then invest in what grows. Clear the invasives. Fill with natives. Repeat until the goldfinches show up and you stop remembering when you put in all that work.
Now go get after it. The yard's waiting. 🌱