Irises like semi shade environment, which is also the reason why most of them are cultivated in greenhouse. In outdoor cultivation, we should pay attention to shade the sun, too much light leaves will turn yellow. Especially at noon in summer, in the hot sun, the blooming iris evaporates quickly under the sun, leaves are easy to be burned, resulting in withered plants.
Solution: shade when the sun is strong. In addition, outdoor breeding iris can be properly sprayed at noon, increasing air humidity and cooling.
Iris doesn't like too humid environment, so it's better not to water too often. The basin soil is stagnant, the root respiration is limited, causing the leaves to turn yellow.
Solution: water once every 7 days during the growing period, reduce the temperature and water slowly, and dry the basin soil slightly.
It's said that iris doesn't need too much water. After all, it's a plant, so a proper amount of water is also necessary. Too dry basin soil is not conducive to its growth, resulting in yellow leaves.
Solution: when growing up, you need some water.
In the process of maintenance, many flower friends are not clear about the fertilizer and fertilizer application time needed by iris. Too much fertilizer will cause soil hardening, affect root growth, and lead to yellow leaves.
Solution: use some base fertilizer before cultivation, and apply fertilizer once a year in autumn. The growth period can be increased appropriately.
