I have stone heads and gurney show cabbage. Some of the heads are forming in witches hats or dunce hats peaks. I am an old gardener; I'm 78 and have never seen this head form like this. Please advise if you can. email@example.com
Cabbage Heads Forming in Witches Hats
Certified GKH Gardening Expert
Cabbage heads can be round, flat or pointed as your describing.
Environmental issues can effect the shape but there are varieties that also grow this pointed shape.
Here is a link with more information.