This section is from the book "The Gardener V2", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
This herb is equally as indispensable as the foregoing vegetable. From various causes, during the spring months, it is frequently very scarce, and where this is anticipated, seed should at once be sown, and grown in a frame, similar to early Carrots; or the seed may be sown in boxes, and placed on a gentle hotbed. The seedlings may be pricked off in boxes, gradually hardened off, and finally planted in a double line, at the base of a south or west wall. They will well repay the trouble. More seed should be sown on the south border. Cooks must have Parsley, which some young gardeners find to their cost. Sow frequently, and allow the plants plenty of room, and the supply will never fail. W. Iggulden.