A: The seeds are black when ripe and will drop from the pod. Tie a piece of mesh around the pod to collect the seed. Or just keep your eye on it. To sow: Barely cover the seed with a moist but ...

Garden columnist Dan Gill answers readers' questions each week. To send a question, email Gill at gnogardening@agcenter.lsu.edu. I have heard that you should not cut off the old flowerheads on ...