Why is green radish yellow?
Green radish is a common indoor leaf-viewing plant, and the problem of yellow leaves puzzles many growers. This article will systematically analyze the causes of yellow leaves from two dimensions: soil culture and hydroponics, and provide operable solutions to help you restore green vitality. Soil cultivated green radish yellow leaves due to imbalance of light intensity Green radish belongs to a semi-negative plant. Direct light at noon in summer will decompose chlorophyll and appear sunburn spots. It is recommended to place it 1.5 meters away from the south window, or use a gauze curtain with a light transmittance of 40%. Improper watering frequency and accumulation of water in the basin soil for more than 24 hours will cause root suffocation, which is manifested by yellowing of new leaves and browning of old leaves. Adopt the bamboo stick test method: Insert the bamboo stick into the soil for 2 hours and then pull it out. If there is no soil adhesion, water can be carried out. Imbalanced substrate ratio An ideal cultivation substrate requires a ratio of peat soil: perlite: coconut bran =5:3:2. Hardening the soil will keep the oxygen content below 12%. It is recommended to replace the breathable pottery basin every spring and add pine scales to improve the structure. Water quality management of hydroponics green radish yellow leaf problem is improper. When the water turbidity exceeds 20NTU, water needs to be changed immediately, and the replacement frequency should be maintained at 3 days per time in summer. Using tap water that is dried for 24 hours can effectively reduce the damage caused by chlorine to roots. The EC value of hydroponic nutrient solution lacking nutrients needs to be maintained at 0.8-1.2mS/cm, and special nutrients containing iron chelates should be regularly supplemented. When the leaves appear reticular yellowing, 0.1% ferrous sulfate solution can be sprayed on the leaves. Yellow leaf solution Practical soil culture plants can adopt the principle of "cutting two and saving one": retaining one healthy leaf for every 2 yellow leaves pruned. Adding 0.01% hydrogen peroxide during hydroponics can increase the dissolved oxygen content. No matter which cultivation method is used, maintaining environmental humidity of>60% is the key.
By scientifically diagnosing the cause of yellow leaves and taking corresponding measures, as well as daily maintenance such as regular pot rotation and cleaning leaf surfaces, green radish can return to health within 4-6 weeks. Remember to observe the signals sent by plants is a required course for becoming a green plant maintenance master.