This stuff is HIGHLY invasive and will spread and grow anywhere and everywhere. If you plan to try it just make sure you stay on top of it while it's green and blooming. Once it dries out the wind will pick up the seeds and soon it will be everywhere.

I had a soil sample done and results showed that my soil was deficient in nitrogen. I seeded an area where I wanted my tomatoes to grow with the hairy vetch. I read that once you are ready to plant where the h.v. grew, you tilled it under first. I fell so in love with the plant and it's lovely little purple penstemon-like flowers, that I just planted my tomatoes right in the h.v. By the time my tomatoes started to grow, the h.v. died back and now is a wonderful mulch for them and the tomatoes are strong and healthy. I promptly planted another small area with the hairy vetch and scattered some wildflower seeds with it. That area now looks like a tiny little wildflower meadow and I'm getting nitrogen in my soil, to boot. the hairy vetch is going into my raised vegetable planters this fall. This is my new favorite plant.