By Robert Pavlis on June 2, 2014 We want to thank Robert Pavlis for permission to use this article. Visit his blog http://www.gardenmyths.com/ for more interesting and humorous posts.
You are at the nursery and have found a nice looking plant. Is it safe to bring home? Your friend has some extra plants and offers to give you some – should you take them? In both cases you can get into a lot of trouble by taking the plant home.
This is a list of invasive plants you should never, never, never add to your garden–unless you want them everywhere. Nurseries should be restricted from selling them to unsuspecting customers.
What is an Invasive Plant?
An invasive plant has two common characteristics. It spreads fairly quickly either by seeds or a running root system. Secondly, the root system is near impossible to remove. Any small bit of root left in the soil will grow again.This is by no means an exhaustive list, but it does contain some of the worst of the worst. I have struggled with almost all of them.
As one of the commenters below points out, invasivness is regional. Something that may be invasive in zone 5 may not grow in zone 8, for all kinds of environmental reasons. This list of plants is invasive in zone 5, Ontario, in clay-type soil, and probably most of Northeastern North America.