Dame's rocket (Hesperis matronalis) is banned in several states for invasiveness, but Georgia doesn't classify it as illegal. The only plants prohibited by state law are marijuana and possibly Oriental poppy. However, "not illegal" doesn't mean "plant freely."
The Georgia Exotic Pest Plant Council (gaeppc.org) maintains a science-based list of invasive plants categorized by threat level. Dame's rocket isn't currently on it, but that could change. Always consult this list before introducing non-natives.
A plant well-behaved in a shaded backyard might spread aggressively in a sunny, moist meadow. Monitor self-seeding. If seedlings appear far from the parent plant, remove them. Responsible gardening means staying informed—laws lag behind ecology.
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