Posted: 01/11/2014 at 08:13
I wouldn't waste broad beans by growing them for green manure. By the spring they will only be a few inches tall, and would make an insignificant contribution - and once they're any bigger, they'll have quite chunky stems that won't break down quickly.
Beware of using a tiller if you have much couch grass (the stringy grass-weed with the trailing white roots) or bindweed. Every broken piece is capable of re-growing and multiplying your problems.
Climbing beans (French or runners) could go against the fence if you give them some extra support to climb on. Parsnips, like carrots, need smooth, loose soil free from big stones or recent compost. Onions or shallot from sets are easy, almost foolproof, and need little attention.
I don't know why you had a problem with your courgettes, most people found them unstoppable this summer. F1 plants should be just as vigorous as any other. Maybe they were short of water, or sun? They like rich soil, space and warmth.
Potatoes are easy but do take up space. Charlotte (second earlies) are a great variety.