I know when I live in Orlando, my mother had bird feeders in the back yard hanging from a post and the birds would make a mess knocking seeds all over the ground, after a while the bird seeds started growing little floweres. Well, one time we went out there to pull them to keep the yard nice and there was a little pot plant growing. it wasn't big, maybe about 6-10 inches tall, but you couldn't miss the leaves. I was deff MJ. So, yes, ther are some bird feeds that have the seeds in them (not sure why though).