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?

The striking foliage of collards is a decorative choice to fill containers. Group pots to keep plenty of fresh greens at hand. Depending on where you live in the South, you can plant collards in early ...