8 Common Solutions for Gardenia Problems
The editor brings you the small experience of solving 8 common problems of Gardenia cultivation. Next, the site editor will introduce to the netizens.
Symptom One
The leaves turn green. It first occurs in the tender leaves at the tip of the branches, starting from the leaf edge and developing towards the center of the leaf. The leaf color changes from green to yellow, gradually worsening, and the mesophyll turns yellow or light yellow. However, the veins remain green. Then the whole leaf turns yellow, followed by yellowish white, and eventually white.
Causes: Gardenias prefer acidic soil. Once the soil becomes alkaline, it will cause insufficient absorption of iron, and iron deficiency will lead to the above symptoms.
Solution: Use acidic soil for cultivation. In routine management, water with a 3000-fold solution of ferrous sulfate every half month to prevent soil alkalization and iron deficiency.
Symptom Two
The new leaves are small and brittle, and the lower old leaves gradually turn yellow. The leaves turn yellow from bottom to top, and the yellowed leaves will fall off naturally.
Causes: This is a symptom of nitrogen deficiency in Gardenias.
Solution: Pay attention to the use of nitrogen fertilizer in routine fertilization and water management. By following the fertilizer management mentioned above, the occurrence of nitrogen deficiency can be prevented. If nitrogen deficiency symptoms appear, use a 3000-fold solution of urea for watering. Stop using urea after watering 5 times and switch to a 20-10-20 fertilizer for normal management.
Symptom Three
It starts from the lower leaves, showing round or nearly round spots that are light brown. The spots gradually expand, causing the leaves to wither.
Causes: Caused by a fungal leaf spot disease.
Solution: Prune and destroy the infected leaves in time. For routine prevention, spray an 800-fold solution of carbendazim every half month, and after the onset, spray a 1000-fold solution of propiconazole.
Symptom Four
Spots appear in concentric circles on the leaf edges, which gradually expand to the entire leaf and can quickly spread to other healthy leaves. In severe cases, the leaves wither and die.
Causes: Caused by the (T-J) disease.
Solution: Prune and destroy the infected leaves in time. For routine prevention, spray an 800-fold solution of carbendazim every half month, and after the onset, spray a 1000-fold solution of prochloraz to inhibit further damage by the pathogen. The plant should be kept dry and well-ventilated.
Symptom Five
Black mold is found on the leaves, and the plant grows weakly. If this black mold covers the entire plant and cannot be controlled, the plant will die due to the inability to perform photosynthesis.
Causes: This symptom often accompanies the damage caused by scale insects. Careful observation can reveal small white-powder-covered insects on the plant, which are scale insects. Their secretions can lead to the occurrence of sooty mold.
Solution: First, remove the scale insects. If there are few, they can be removed manually; if there are many, use a 2500-fold solution of扑磷 to spray and kill them, ensuring the pesticide is sprayed directly on the insects. The black mold should be wiped off with a cloth. As long as the number of scale insects is controlled, the degree of sooty mold can be controlled.
Symptom Six
Irregular notches appear on the leaves, and there are more and more of them.
Causes: Observe in the evening to see if there are caterpillar larvae eating the leaves, especially the tender leaves. Even if no pests are found, it can be judged as pest damage.
Solution: Spray a 2500-fold solution of敌杀死 or a 1000-fold solution of氧化乐果 in the evening, once a week for 4 weeks. Spray thoroughly, including the potting soil, to control the pests. Pay attention to observation during routine maintenance.
Symptom Seven
The plant's growth vigor is decreasing, with no obvious pests or diseases, leaves falling off, and branches becoming weak.
Causes: Check the roots by removing the pot to see if they are rotting. Generally, the degree of root rot is proportional to the degree of branch weakness.
Solution: If the degree of rot is severe, it is usually incurable. If there are only a few rotten roots, cut off the rotten roots, stop watering, and strictly control the moisture of the substrate. The plant needs sufficient light but not too strong. Withered branches should be cut off. When the substrate is dry, apply a small amount of potassium sulfate 3000-fold solution, just enough to penetrate the substrate. The principle is to keep the substrate dry, keeping the plant slightly water-deficient. Be careful with this balance, otherwise, it will backfire.
Symptom Eight
The top branches droop, and the leaves hang down and gradually lose water and dry up.
Causes: The plant lacks water, the substrate is too dry, or the plant has not been shaded in time after transplanting can cause the above symptoms.
Solution: Replenish water in time and move the plant to a place with weak light. Wait until the roots recover before moving it back to its original position.
The above is a detailed introduction to the solutions for 8 common problems of Gardenia. Did you get it?