Q: My sister asked if I’ve ever heard of purple tree collards, and if they would grow in North Dakota. I told her I knew who to ask! Do they grow here, are they a perennial, and how do you start them?

You love collard greens, but did you know there are so many varieties to love? And so many ways to love them? Like many vegetables, collards are mostly sold as just plain “collards” at the grocery ...