The suitable temperature for cultivation in the daytime is 25-28 ℃, the temperature at night is 18-20 ℃, and the seedlings should be raised to about 23 ℃ at night. In such a temperature environment, the iris flowers are growing almost all the year round, especially the seedlings grow rapidly; the seedlings removed from the test tube can bloom in about 1-2 years.
The original place of iris is usually a humid grassland, so it is necessary to create an environment with high air humidity. Generally speaking, humidity should be kept at 60-80% throughout the year. In order to increase the humidity of the local environment, we must try to improve the air humidity of the cultivation environment by sprinkling water to the ground, platform, wall and other places several times a day, or by a small amount of waterlogging to the plant page.
When cultivating iris, remember to have a good sunshade condition under the strong light. Although the leaves of iris are too wide and thick, and there is abundant water stored on the leaves, the cuticle and drought resistance structure of the leaf surface are relatively poor, so once the direct sunlight is encountered, the water loss is more, or the supplement is not timely, the leaves are prone to sunburn.
In North China, the winter and spring seasons are usually sunny, and there are few rainy days. At this time, proper sunshade is needed.
When the sun is strong and the temperature is too high in summer, the sunshade net or bamboo curtain should be covered outside the greenhouse glass to play a dual role of greenhouse cooling and sunshade, and its sunshade amount should be more than 60%. In autumn, it only needs to be covered by 40%.
