 For potted flowers a lower temperature is used for precooling (5°C for 15 weeks), followed by 16°C – 18°C in a greenhouse. For later blooming (mid- and late-forcing), bulbs are harvested in July to August and the higher temperatures are omitted, being stored a 17 – 20°C after harvesting and placed in cold storage at 9°C in September for 17 – 18 (cut flowers) or 14 – 16 (potted flowers) weeks. The bulbs can then be planted in cold frames, and then forced in a greenhouse according to requirements.
