Causes and treatment methods of gardenia yellow leaves
Gardenia is deeply loved for its white aroma, but yellowing of its leaves often occurs during maintenance, which troubles flower friends. Yellow leaves are not only a distress signal from the plant, but also reflect misunderstandings in daily maintenance. By systematically analyzing common causes and taking targeted measures, gardenia can regain its green vitality. Identification of symptoms caused by improper water management in yellow leaves and rotten roots. Although gardenia likes humid environments, water accumulation in the soil for more than 2 hours will hinder root respiration. At the beginning, new leaves wilting and drooping, then old leaves appear water-stained spots, and in severe cases, the roots turn black and rot. The humidity can be detected by inserting a bamboo stick into the pot soil. There is no need to water when the surface is dry but the interior is still wet. The scientific water replenishment operation process immediately removes the pot if water is found, uses disinfection scissors to prune the rotten root system until white healthy tissue is exposed, and retains 1/3 of the raw soil and transplanted it into the red pottery pot. The newly mixed soil is mixed in the ratio of humus soil: river sand: perlite =5:3:2. A small amount of water is supplied along the edge of the basin at the beginning, and normal maintenance is gradually restored after new buds germinate. Imbalance of soil environment leads to yellowing pH test method Gardenia is suitable for a slightly acidic environment with a pH value of 5.5-6.5. The alkaline water quality in the northern region may easily lead to soil alkalization. pH test paper can be used to detect the leaching solution of basin soil. When the value is>7, the leaves will show overall yellowing, and the chlorosis between veins will be obvious. Specific steps for soil improvement add pine needle soil or sulfur powder to adjust the pH value when changing pots, and use 1000 times of ferrous sulfate to irrigate roots every month. It is recommended to use peat soil mixed with fermented pine bark (ratio 3:1) as a substrate to retain water and ensure breathability. After soil change, the seedlings were placed in a scattered light environment to slow down the seedlings for 2 weeks. Improper fertilizer application causes fertilizer damage symptoms. Development process After applying undecomposed organic fertilizer or high-concentration chemical fertilizer, leaf tips appear scorched within 3-5 days, and then yellowing spreads to petioles. White salt frost can be seen separating out on the surface of the basin soil, and in severe cases, the root system will appear reddish-brown dehydrated. Emergency treatment and scientific topdressing Immediately irrigate roots with clear water three times to cut off damaged leaves. During the recovery period, 0.1% potassium dihydrogen phosphate was sprayed on the leaves, and during the growth period, a special nutrient solution for gardenia diluted 2000 times was applied once a month. It is recommended to adopt the principle of "applying thin fertilizer frequently" and carry out simultaneous watering.
By accurately identifying the causes of yellow leaves and taking corresponding measures, as well as daily maintenance such as regular loosening of soil and moderate shading, most yellow leaf problems can be effectively improved. It is recommended to observe the plant's response for 7-10 days after each adjustment of maintenance measures, and gradually establish a maintenance plan suitable for the local environment so that the gardenia can continue to bloom with its fragrance.