Where to Find BannedPlant Lists. Illegal plants in U.S. states can be noted in USDA literature, extension sites, libraries, PSA leaflets, and more. They’re considered invasive plants in the UK and banned from sale under the EU regulations. They're established in the wild in areas of the UK such as Cornwall and the West of Ireland. Few may realize that there are a number of bannedplants in the US, and growing them in your garden can come with a fine. Different states have different lists of bannedplants... You've planted an invasive species that's banned in our state. Arborists are on their way, and you will be billed for the removal." The state terms the bannedplants as “noxious weeds.” Noxious weeds are plants deemed harmful to public health, crops, livestock, agricultural land, or other property. Last Friday I featured Lilium formasanum on Plant Collector. I wouldn’t have done so had I known it was on the Pest Plant Accord list. In other words, it is banned from propagation and sale... Because of these health risks, several states strictly regulate or ban its cultivation. Giant hogweed spreads rapidly along waterways and roadsides, outcompeting native plants and creating... Van Rees notes that while some of the “really bad” invasive plants are being banned incrementally, they’re often still available to purchase at stores—even in states with active bans in place. They look harmless, even beautiful, but beneath the petals and leaves lie toxins, invasions, and centuries of controversy. Across the U.S., these plants have been banned for reasons... But it’s not as highly regarded in other countries. The pretty plant is banned in the American states of California and Hawaii, where it is listed as an invasive weed. Any other bannedplants you know of? Or general categories, i.e., "higher than the roofline" etc.? Yes, I agree, I don't love HOAs :rant: , but they're around. So, how about it? We checked out some regulations across the country. Here are twelve plantsbanned from gardens for good reasons. Which one do you think is the weirdest? New Zealand's bannedplants. Thirteen plants have been banned in New Zealand after they were listed as invasive species.