This section is from the book "The Gardener V3", 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.
The wall-borders are very commonly utilised for raising the principal portion of Broccoli, Cauliflowers, Brussels Sprouts and other greens, and this I consider a mistake, simply because the space is much too limited, the consequence being beds of weakly plants - the reverse of what should be aimed at. By all means sow seed of a few early Cauliflowers, Brussels Sprouts, and even Broccoli, on these borders; but give the plants room. Sow the seeds of main and late crops thinly in the open, and thereby secure sturdy plants that will move readily at any time. W. Iggulden.
 
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