Did you ever wonder which out-of-town plants are okay to put in your flower bed and which ones are likely to slip their leash and turn into the next kudzu infestation?  The Ladybird Johnson Wildflower Center has an extensive list of cultivated plants known to be invasive along with non-invasive alternatives. 

Say you're at the local nursery and notice a pretty honysuckle for sale --- should you buy it?  Stop by the website and you'll see that Japanese Honeysuckle is an invasive, but that you can choose between 11 alternatives which fill a similar niche.  Just what I've been looking for!