When will irises be sown?

Iris, also known as purple butterfly and flower butterfly, is a common flowering plant in China. At present, it is often used as flower bed and courtyard greening. When will Iris be sown?

When will irises be sown?

Iris can be sown in February-May in spring or August-September in autumn, but it is generally best to sow in spring. Before sowing, soak the seeds in warm water for a whole day, then plant them in flowerpots at intervals of 1-2cm, and finally cover them with a layer of sand and spray some water properly.

Second, how to grow irises?

1. Soil: Iris should choose clayey loam rich in humus or alkaline soil mixed with limestone, and apply rotten compost and a small amount of bone powder and plant ash as base fertilizer before planting. In addition, irises should not be planted too deep, and the roots should be pressed.

2. Temperature: Iris likes the moist environment with plenty of sunshine, and the optimum growth temperature is 15: 17 ℃. If the light is too strong, it should be shaded properly, and if the humidity is too high, the humidity can be reduced by heating and ventilation.

3. Watering: irises should be watered once after planting, and then can be watered according to the dry and wet condition of the soil. Generally, it is better to dry the soil slightly, but avoid stagnant water or long-term excessive moisture. In order to keep the plant beautiful, the leaves of the plant can be cleaned.

4. Fertilization: the iris flower was topdressing twice in spring and autumn, the application rate was 60 g / m2, 4 parts of bone meal, 2 parts of calcium superphosphate, 1 part of potassium sulfate and 1 part of ammonium sulfate were used in spring, and 4 parts of bone meal, 2 parts of calcium superphosphate and 1 part of potassium sulfate were used in autumn.

5. Diseases: the diseases that are easy to occur in the process of iris culture are mainly soft rot. If soft rot is found in the plant, the plant should be dug up in time, the rotten part should be removed, and the planting site or pot should be changed for transplanting.

6. Insect pests: the main pest of iris is bean beetle, which is mainly treated by artificially killing adults and poisoning larvae. 250 times 25% wettable imidophos can be infused to prevent underground pests, and withered leaves should be cleaned to destroy branches in winter.

Generally speaking, iris can be sown in February-May in spring or August-September in autumn, but it is best in spring.