Hello group
I hope you all had your best cropping year as I have(partially)
My first two years gardening a veg plot were a learning for me and to get
what I thought was a good soil, and I thought I had it.

I live in S****horpe which is in UK South of Hull

I have had a great third year with my veg plot: potatoes, beans, tomatoes,
herbs, onions, garlic, shallotts etc.

My cabbages and cauliflowers however have failed for two years running!
In the first year I had cabbage maggot, and I got over that problem this
year by using "collars" to stop them laying eggs at the roots.

THIS year they have looked lovely and green, but have not "hearted up"
despite feeding them at regular intervals with blood/fish/bone and also
growmore.

3 small plots, one with blood/fish/bone the second with growmore, the third
with both (and a couple with no fertilizer at all...they are useless)

I have rung the changes so that my own cultivations and shop bought are in
shared and different beds to eliminate fault but all are the same.

What can I be doing wrong?

Thanks for reading this lengthy text.
Part_No