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What is the best method?

Many vegetable seeds are best sown in V-shaped drills about 12 mm (½ in) deep for most seeds, although larger ones, such as those of French beans, need drills that are about 5 cm (2 in) deep (see below for desired depths for specific vegetables). Seedlings in a V-shaped drill, which produces a narrow row, will usually require thinning (see below). A few vegetables, such as garden peas, can be sown in flat-bottomed trenches; this enables a broad row to be created.