More lessons learned from my first season of growing food:
Scarecrows on an allotment are a vandal magnet.
Lettuces and radishes are quick, easy, and fun.
Rhubarb - you can have too much of a good thing.
I didn't have any luck with planting broccoli and cabbages direct into the ground. I don't know why not. Next year I'll try them in pots first.
Pumpkins also didn't work when sown directly into the ground. Try these in pots first.
Beetroot on the other hand worked really well, but I don't actually like them all that much. Don't plant so many next year.