Chicory - Radicchio - Cultivation
Radicchio is a cool season plant that grows best in cool climates, full sun, and can tolerate some frost. It requires well-draining soil that is rich in organic materials and high in nitrogen. Radicchio has a shallow root system and needs to be frequently watered to remain moist or else the leaves will become progressively bitter. Mulching will also help maintain moisture and prevent weeds from growing. There are forcing and non-forcing Radicchio varieties. Forcing is a term used to describe the process of pruning, cutting the head and roots, and re-growing the plant in a cool, dark environment to create a bitter-sweet flavor and unique coloring. Radicchio is typically grown from seed or transplanted in the spring and can also be planted again in the fall for two seasons of crop. In the spring it should be planted indoors and transplanted outside 3-4 weeks before the last frost. Radicchio can be harvested 60-85 days after planting, depending on climate and variety.