Are my veggies growing properly? (photos)

[jayssababy]

Hi everyone,
This my first attempt at a backyard garden and I'm not sure if my veggies are growing correctly. I planted them in mid October in North Carolina with soil n manure, so its been 4 weeks. They were seedling from the local nursery at that time.
Id like to triple or more my garden for spring time but I want make sure I'm doing thiss right :)

The first two pics are top n side view of cabbage, next is cauliflower and last is brocoli.
Thank you for your help!

[jayssababy]

The stems of my cabbage plants seem kind of long to me. I think they are about 2 maybe 3 inches from the soil to the bottom leaves. Is that too long, do I need to put more soil under them or are they suppossed to look like that.
Thanks again