Seed should be sown thinly in rows 1 foot apart; for leaf types, thin plants (see: Guide to Thinning Your Seedlings)to 2-3 inches apart, then thin again by pulling every other plant when half grown. This will encourage thickly developed plants. For head types, space rows 18 inches apart, plants 8-10 inches apart. Closer spacing results in smaller heads, which may be preferable for small families. Specialty growers are spacing lettuce very close for selling baby lettuces, a rapidly growing produce market. How to Grow Organic Lettuce from Seed »
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