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Temperature: Tulips are extremely cold-tolerant and can withstand temperatures as low as -35°C during the winter dormancy period. However, they can also be cultivated in the open field in areas with a minimum winter temperature of 9°C. Low temperatures below 9°C that last for more than 16 weeks will break bulb dormancy. to allow normal growth and development. The suitable temperature during the germination period is 9 to 13°C, and it basically stops below 5°C. The optimal temperature during the growth and flowering stages is 15-20°C. If it exceeds 20°C, the leaves will easily become leggy. The temperature during the formation period of new balls is about 20℃. The optimal temperature during the flower bud differentiation period is 20 to 30°C. Flower bud differentiation will be inhibited when it exceeds 30°C, but the temperature requirements are slightly different between different varieties. Lighting: Tulips are day-neutral plants with lax requirements on the length of sunlight. They like light and can tolerate semi-shade. However, if the light intensity is too low, photosynthesis will be weakened and growth will be poor. Moisture: Tulips tolerate neither drought nor moisture. Too wet soil has poor air permeability and is prone to gray mold. If it is too dry after planting, the flower buds will dry out and shrink early.