I grew some purple kale last year. In the fall, I harvested it, but left the root and bottom leaves in the garden, as advised by someone. This year, one plant shot up to 3-4' high and is flowering. I want to collect the seeds, but can't find them. I went to the flowers with a paintbrush, just in case they weren't pollinated, but the bumble bees seemed to be busy with the flowers, also. A couple of the first flowers have dropped their petals, but I don't see any seed pods developing, yet.