When to Sow Iris Seeds? A Detailed Guide to the Best Sowing Time

Iris, also known as purple butterfly and flower butterfly, is a common flowering ornamental plant in China and is currently often used for flowerbed and courtyard landscaping. So when to sow iris seeds?

1. When to sow iris seeds?

Iris can be sown in spring from February to May or in autumn from August to September, but sowing in spring is generally best. Before sowing, soak the seeds in warm water for a whole day, then take them out and plant them in a flower pot at a spacing of 1-2cm, and finally cover them with a layer of sand and spray some water appropriately.

2. How to grow iris?

1. Soil: For iris, choose clay loam rich in humus or alkaline soil mixed with lime. Before planting, apply decomposed compost and a small amount of bone meal, plant ash, etc. as base fertilizer. In addition, do not plant iris too deep, and press the rhizome firmly.

2. Temperature: Iris likes a moist environment with plenty of sunlight, and the most suitable growth temperature is 15-17°C. If the light is too strong, shade it appropriately. If the humidity is too high, reduce humidity by heating and ventilation.

3. Watering: After planting iris, water it thoroughly once, and afterward water according to the dry and wet condition of the soil. Generally, slightly dry soil is better, but avoid water accumulation in the soil or long-term excessive moisture. To keep the plant looking attractive, the leaves can be washed.

4. Fertilizing: Topdress iris twice during the growing period, once each in spring and autumn, at 60 grams per sq m. In spring, use 4 parts bone meal, 2 parts superphosphate, 1 part potassium sulfate, and 1 part ammonium sulfate; in autumn, use 4 parts bone meal, 2 parts superphosphate, and 1 part potassium sulfate.

5. Diseases: The main disease that iris is prone to during cultivation is soft rot. If soft rot is found on the plant, dig up the plant promptly, cut off the rotten parts, and change the planting site or repot it for transplanting.

6. Pests: The main pest of iris is the bean chafer. Treatment is mainly by manually catching adults and poisoning larvae. A 250-fold dilution of 25% wettable imidophos can be poured to prevent underground pests. In winter, clean up dead leaves and destroy branches.

Overall, iris can be sown in spring from February to May or in autumn from August to September, but sowing in spring is best.