reply to Andy

[charles]

 It sounds like an exciting project and good luck with all your growing.

Some vegetables do best  from being raised as one plant per module or plug – lettuce, endive and calabrese for example. They can be either sown in a seed tray and then pricked out as one seedling per module, or sown as two seeds per module and then thinned to one, after germination. Which method you use is purely down to individual preference.

It should be clear from my books which vegetables can be grown as mini clumps, from sowing several seeds per module. Beetroot, onions, spinach and mustards all work well like this.