Poor cauliflower growth

Hi everyone planted out summer caulis in May seemed to be growing well,then stopped, some developed no curd, and the others went to seed.Planted cabbage and broccoli at the same time and although not as big as usual all are ok..any suggestions thanks😁

Hi, probably not as much as I should have,I have fed twice,I was told by a chap at my local allotment to not water very much as this encourages the roots to search for water, hence a stronger plant