You'll often hear this being talked about by gardeners, especially at this time of year: but what is it, and why do we do it? There are various theories about…
When grown under glass grow in a loam-based compost add a little grit and humus with full light. When grown outdoors grow in any moist soil with full or partial sun.
You can sow the seeds in the spring, both hardy and tender species.
Pests, diseases or disorders
Watch out for red spider mites and whitefly under glass, snails and slugs outdoors.