Growing red cabbage

Question

I am growing red cabbage and put to earth first week of June. The plants have taken on a flower and are not seeming to form cabbage heads. Why? Live in Chicago area. Well lit garden and 12 inches between plants.

Answer 1

This article should answer your questions: https://www.gardeningknowhow.com/edible/vegetables/cabbage/cabbage-head-formation.htm