Iris can be seeded in the way of propagation, but there is a disadvantage of using seed propagation is that the seedling rate of direct seeding is relatively low.
When sowing iris, the temperature of seed germination is between 15 ℃ - 30 ℃. If the temperature is not appropriate, the germination rate will be very low. Before sowing, it is generally required to accelerate germination, which can be soaked in warm water to improve the germination rate of seeds. The collection of seeds is suitable for November. Cut off the inflorescence of iris, take out the seeds, and sow in February and March. When sowing, you can use the method of strip sowing. If the temperature is low, you can cover it with plastic film for heat preservation.
Sowing reproduction need to pay attention to, iris seed germination bad at room temperature, storage more than 5 years of seeds, vitality will decline, generally in storage will take the way of variable temperature storage.
In general, the ramet propagation of iris can be carried out all year round, but spring and autumn are the best propagation time. The iris will be divided, and then every 2 - 3 plants into a cluster for planting.
Keep 3-5 leaves for each new plant of iris, and other leaves can be cut off. The survival rate of replanted plants is higher, and shading should be done when the temperature is high
Iris can also adopt the way of tuber propagation, which can be carried out throughout the year, but it is also better in spring and autumn. Cut the underground rhizome of iris into 10 cm long sections, each section with several bell buds. When planting the rhizome, you can put the rhizome into a dug ditch, with the rhizome facing up, the whisker unfolded, covered with soil, and then poured with water. In the low temperature can be covered with plastic film, high temperature to shade
