Posted: 07/04/2015 at 13:37
Cabbages, beetroot, carrots, spinach and onions are hardy, but if they've been kept indoors they need hardening off first, which means protection at night or if it's very cold for about a week until they are used to being outside. Carrots don't like root disturbance, never heard of them as plugs. I sow seeds, will sow some this afternoon. Then you thin them out, leaving some to grow on.
French beans and pumpkins are not hardy. They will need to be indoors until frosts are over.