Step-by-Step Growing Guide
Saffron (Crocus sativus) is an autumn-flowering crocus grown from corms in well-drained, moderately fertile soil at pH 6.0–8.0 — excellent drainage is absolutely paramount; saffron corms rot within days in waterlogged conditions. Plant corms in late summer (July–August in the northern hemisphere), 10–15 cm deep and 10–15 cm apart, in the warmest, most freely draining spot available — a south-facing slope, raised bed, or gravel garden are ideal. After planting, the corms need a warm, dry summer dormancy followed by autumn rains (or irrigation) to trigger flowering. Flowers appear in October–November before the leaves, making timing of planting critical. After flowering, long, grass-like leaves emerge and grow through spring — do not mow or remove until they yellow naturally. Feed with a potassium-rich bulb fertilizer in early spring. Lift and divide corms every 3–4 years when flowering begins to decline. Corm multiplication is slow; expect 3–10 new corms per planted corm annually.
