What to do if the leaves of the black orchid rot
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What to do if the leaves of the black orchid rot
Overwatering can cause the leaves of the black orchid to rot. When watering, follow the principle of alternating wet and dry, and adjust the watering and fertilizing frequency according to the season. If rotten roots are found, change the soil immediately, clean the rotten roots, and use the appropriate medication for root soaking. Rotten leaves should also be pruned. For rotten leaves caused by diseases and pests, prevention and treatment should be carried out according to the different diseases, but also change the soil to remove decay, then消毒 the new pot and soil with drugs such as carbendazim.
Causes of Rotten Leaves on Black Orchids
Manifestation: The leaves of the black orchid show yellowing and root rot, and then the leaves will gradually dry and rot and fall off. The general causes of this situation are:
1. Overwatering: Overwatering is the main cause of leaf rot. Black orchids prefer a warm and dry environment and do not require much water, especially black orchids grown in nutrient-rich soil. The water retention of nutrient-rich soil is good, and frequent watering can cause the roots to be unable to breathe, leading to root rot and leaf rot.
2. Low temperature: The probability of this cause is relatively low because black orchids are very cold-tolerant. Generally, as long as the temperature does not drop below 2°C, it will not cause yellowing of the leaves. However, if the humidity of the air is too low for a long time, it can cause the edges of the leaves to dry out and then rot.
3. Over-fertilization: When planting black orchids, fertilization should be moderate. If excessive fertilization occurs, it can easily cause burning of the seedlings, which can then lead to leaf rot.
4. Impact of diseases and pests: Black orchids are prone to many diseases and pests, so careful observation and care are necessary. If diseases and pests are found, they should be treated promptly. If diseases such as (T-J) disease or brown spot disease occur, a systemic fungicide can be sprayed once a month for prevention and treatment.
Methods for Treating Rotten Leaves on Black Orchids
When watering, follow the principle of alternating wet and dry, i.e., water when the soil is dry and water thoroughly. Also, pay attention to the watering method, do not water directly from the top, and water around the edge of the pot to ensure even distribution of water and prevent water from entering the flower center and causing rot.
Adjust the watering and fertilizing frequency according to the season. If rotten roots are found, change the soil immediately, clean the rotten roots, use the appropriate medication for root soaking, and prune the rotten leaves.
Prevention and treatment should be carried out according to the different diseases, but also change the soil to remove decay, then消毒 the new pot and soil with drugs such as carbendazim. After replanting, the black orchid should be watered by submerging the bottom of the pot in water, controlling the watering, and not overwatering.
During the recovery period from root rot, it is best not to fertilize the orchid and avoid heavy rain watering. Normal watering and fertilizing management can be carried out after the leaves return to normal.
Preventing Rotten Leaves on Black Orchids
Black orchids thrive in nutrient-rich, loose, and well-drained acidic soil, which is beneficial for water and nutrient retention.
Black orchids prefer partial shade, and gentle sunlight in winter and spring is beneficial for growth, allowing for full-day sunlight. In summer and autumn, when the sun is strong, appropriate shading is needed. You can place the black orchid under the eaves, only expose it to light in the morning or evening, and avoid direct sun exposure on the leaves.
Fertilizing black orchids follows the principle of dilute fertilization. Generally, start in late spring and stop in late autumn. When the temperature is between 18-25°C, fertilization can be done every 20 days. After fertilizing, spray a small amount of water to prevent fertilizer from getting on the leaves.
The above [] provides a detailed introduction on what to do if the leaves of the black orchid rot, hoping to bring some knowledge about flowers to orchid enthusiasts.