Ever since I found out that you can regrow scallions, I've been obsessed with regrowing them. It's so much fun! And so easy!!
I cut the bottoms off, and stuck the bottoms of the scallions in a pot of soil in a sunny windowsill and within 2 weeks, scallions started to regrow! This is the best!! I'm going to try to regrow scallions every time I buy them, maybe one day, I'll never have to buy them again! That about sustainable!! Try it, but WARNING, you'll get obsessed with it!!