The quick and convenient step by step guide to growing your Chicory Seeds! Chicory is tough and can be planted when frost is still around in spring. Chicory is a cool weather crop and grows best at temperatures of 55–75°F. Check Out The Sacred Plant Co Seed Selection Growing Your Chicory From Seed In 5 Steps # 1 | Direct sow your chicory seeds when temperatures are between 45–85°F with the highest germination at 75°F. # 2 | Sow your chicory seeds 1″ apart, rows 12–18″ apart.