Yeah, I really tried for years to grow spring cauliflower and failed miserably. Someone suggested I do fall and I couldn't believe it! I had the most beautiful cauliflower ever! I grew Denali, from Johnny's and it was prettier than what you buy in the store and self wrapping, which I had no idea there were any cauliflowers that did that. I was used to always having to tie the big outer leaves up around the head to blanch it. Not Denali.
Of course, just because I have to push, I will try spring cauliflower again, and again, and again. Hopefully one day I will be successful. You know, down here it goes from winter to summer without much of a spring.
Broccoli is much easier but do watch for variety since some are really more suited for fall.
