Still on the Shelf: Invasive Plants Connecticut Garden Centers Keep Selling
Walk into almost any garden center in Connecticut this spring and you can still buy plants that ecologists have spent decades trying to get out of our woods. They’re often the ones with the cheerful tags — “fast-growing,” “low-maintenance,” “deer-resistant.” Those tags are true. That’s exactly the problem. A plant that grows fast, needs nothing, and nothing eats is a plant that escapes the yard and takes over everything downhill from it.
Here’s the honest legal picture, because it matters and it’s widely misunderstood: most of these are still perfectly legal to sell in Connecticut. A few are already banned. Several more are scheduled to be banned — Connecticut passed phase-out dates in 2024 and 2025 — but those dates haven’t arrived yet, and Massachusetts already banned the same plants years ago. So they sit on Connecticut shelves in a window that’s closing.
We’re not naming stores here. We’re naming plants — because the plant is the problem wherever you buy it, and because the fix is the same either way: don’t buy it, and plant something better.
The ones to walk past
Japanese barberry (Berberis thunbergii)
Everywhere, in every color. It forms dense thorny thickets that crowd out native understory — and research has tied barberry stands to higher humidity at ground level and denser mouse populations, which is part of why they correlate with more blacklegged ticks. Connecticut sales ban takes effect October 2028. Already banned in Massachusetts. Still sold here today. Plant instead: inkberry holly (Ilex glabra), Virginia sweetspire (Itea virginica), or lowbush blueberry for a thorn-free, wildlife-feeding hedge.
Burning bush (Euonymus alatus)
Sold for its red fall color, which lasts about two weeks; the seeds it drops last for decades, sprouting into forests where it shades out everything native. Connecticut sales ban October 2028. Already banned in Massachusetts. Plant instead: red chokeberry (Aronia arbutifolia) or Virginia sweetspire — both give you the fall color and feed birds.
Norway maple (Acer platanoides)
Still sold as a shade tree. It casts shade so dense, and roots so greedy, that almost nothing grows beneath it — including grass — and it seeds aggressively into woodlands. Connecticut sales ban October 2030. Plant instead: red maple (Acer rubrum), sugar maple, or a serviceberry if you want something smaller that flowers and fruits.
Callery / Bradford pear (Pyrus calleryana)
The white-flowering street tree that smells terrible and splits apart in storms. It has hybridized into thorny wild thickets across the region. Connecticut sales ban October 2027. Plant instead: serviceberry (Amelanchier), native flowering dogwood, or American plum for spring flower without the invasion.
A myth worth correcting
English ivy gets blamed a lot, and it is invasive across the eastern US — but for the record, it is not currently banned or even listed in Connecticut (it’s banned in Oregon, Washington, and Maryland). We mention it because we’d rather be accurate than alarming. There’s a different plant, ground ivy, that is on Connecticut’s banned list — easy to confuse by name, completely different plant. When the stakes are “should I rip this out,” getting the name right matters.
Why we care enough to write this down
Grow Wild builds landscapes meant to get better over decades, not landscapes that quietly become a maintenance problem — or worse, a source of invasion for the whole neighborhood. Every plant on the walk-past list has at least one native that does its job better and asks for less. That’s not a sacrifice. It’s the upgrade.
If you’re staring at a yard that’s already full of these and wondering where to start, that’s exactly the kind of thing our Plant Finder and design service are built for — we’ll tell you what to pull, what to plant, and where in Connecticut to actually buy the replacements.
A note on the law: sale-ban dates and species lists come from the Connecticut Invasive Plants Council and change periodically — this reflects the 2025 list. “Legal to sell” is not the same as “good to plant.” Nothing here is legal advice.