[Sid]

Parsnips!

[potatogrower]

always had a problem trying to grow carrots for past 2 yrs. growing them this year and just pick a few to make sure all is fine and so far its looking good. next to conquer is cauliflower and brocoli

[Christine]

Basil  After doing well with sage, parsley and rosemary from seed - the basil failed. 

[jules1]

Celeriac. Takes weeks to germinate, grows to a couple of inches then keels over and dies!

[crh75]

Every year seems to be different. This year I have had trouble with beetroot and parsnips whereas last year I couldn't eat enough of them. Last year garlic and carrots were poor, this year fantastic!
But, I think each year I learn a bit more about how to produce a good crop and that is the most important thing.

[themoog]

Anything globe shaped - radish, beetroot, turnip.

I'm refusing to bother with radishes next year. I don't even like them  !