two dozen Saffron Crocus will supply enough of the precious spice in the first year for a few memorable dishes. Then, with each successive year, the corms (which look like bulbs) will multiply, the size of the planting will increase, and you'll be able to harvest more of the spicy stigmas. After 4 to 6 years, you should divide and replant the corms (do it right after the foliage has faded). Division prevents overcrowding, which can lead to a decrease in flowering.