After iris planting, soil temperature is a crucial factor, with the lowest being 5-8°C and the highest 20°C. The soil temperature directly affects germination rate. Low soil temperature can reduce flowering ability, so it is most suitable to maintain soil temperature between 16-18°C. For greenhouse iris production, the appropriate temperature is 15°C. To shorten the growth period, newly harvested bulbs can be used for planting, with the greenhouse temperature kept at 18°C for the first 4-3 weeks. This temperature can be maintained until January 1st, but it may cause the plants to become weak. Temperatures of 13°C or lower will extend the growth period, increase plant weight, but also increase the likelihood of flower wilting.