Flower yield is highly dependent on corm density and corm size. Traditionally, saffron is grown on raised beds to allow good drainage and easy access for picking Corms are planted out during their dormant period in summer. In Italy, where annual planting is practised, the best yields for flower and corm production are obtained by leaving a space of 2-3 cm between each corm in the furrow, with a planting depth of 8-10 cm. Optimal corm quantity per hectare is 13-15 tons, which is about 600-750 thousand corms with an average weight of 20-25 g each.

 zift 10-11 (45-50 corms/kg). In Herath Afghanistan they use  raised beds with rows 30 cm apart. Bunches of two or three corms are planted 10-15 cm apart within rows There the planting depth is about 15 cm and about 5 tons of corms are used per hectare. In Greece, corms are planted in furrows formed with a plough, with corms placed about 12 cm apart along the row and about 15 cm deep.The distance between the rows is about 30 cm. This is about 250 000–300 000 corms per hectare. In India, corms are planted 7.5-10 cm apart, in rows 15-20 cm apart. Double rows are often used in Spain with a spacing of 3.0 cm between rows and 6.0 cm between corms in a row. Recommended planting depths for corms vary from 7.5-10 cm to 15-22 cm. In Italy, a planting depth of 15 cm gave better yields than shallower or deeper planting.

Planting depth affects corm production; more buds sprout from shallow planted corms than from deep planted ones, resulting in more daughter corms. Corm size has a significant effect on the production of daughter corms and on the production of flowers and the yield of saffron. The larger the mother corm, the more daughter corms will be produced in the annual cycle, which increases the potential for higher yields in subsequent years. Our research shows each original mother corm, above 20 g, produced an average of six new corms (in the second year), while the mother itself decayed. In the third year, the total mean corm number had risen to 20-25 new corms from each original mother corm, while in the fourth year that total had risen to 60-70.

The weight of corms produced is also affected by the weight of the original mother corm. When the original mother corm is above 30 g, the total weight of replacement corms doubles in the second season, is 10 times heavier than the original in year three, and in year four is about 16 times heavier. New saffron corms also grow above the old ones each season, so they creep towards the soil surface by 1-3 cm each year. Therefore, the crop needs to be lifted and replanted periodically. This  about every 5 years in Spain, but fields may last up to 10 years or more under non-irrigated conditions in La Mancha. Replanting is normally done when yields begin to fall due to overcrowding or damage to corms that are too close to the soil surface. At GROWING SALES EXCHANGE field in Spain, large corms were planted at least 15 cm deep, while smaller corms were planted at 8-10 cm.