Orchid Autumn Management
Today's editor elaborates on the experience of orchids in the orchid family, orchid autumn management, if there is anything wrong, please correct!
As autumn approaches, some orchid friends need to understand orchid autumn management. Autumn is another golden season for raising orchids. Orchid growers should grasp the climatic characteristics of autumn, focusing on adjusting light, potting and dividing plants, fertilizing and watering (G-Y), and pest control.
1. Increase lighting and increase temperature difference to promote bud growth.
The sunlight in autumn can enhance the resistance of orchids to diseases and cold, so in autumn, it is necessary to reduce the shading as much as possible, allow orchids to receive more sunlight, open the windows of the orchid room at night, and fully ventilate and exchange air to increase the temperature difference between day and night. Orchid growers know that increasing orchid lighting and increasing temperature difference in autumn is a quick way to promote bud growth. In areas with more sunlight in nature, the more orchids bloom also proves this point.
2. Watering and fertilizing.
In the dry autumn with no rain, more attention should be paid to watering and moisturizing. If the humidity is too low, it can be sprayed to keep the environment humid and prevent the orchid leaves from drying. After the summer growth, most of the nutrients in the pot have been consumed, so more attention should be paid to supplementing fertilizers in autumn. The method is to apply organic fertilizers once every 10 days, and foliar spray nitrogen fertilizers, also once every 10 days, which can be alternated. In addition, while applying organic fertilizers to the roots, some phosphorus and potassium fertilizers can also be added appropriately. Phosphorus fertilizers can promote the strong growth of orchids and the differentiation of flower buds. If there is a lack of phosphorus in the planting materials, it is generally difficult for the plants to bloom. Usually, 0.2% to 0.3% phosphoric acid potassium liquid can be used for foliar spray, once every 5 to 7 days, for 2 to 3 times. The fertilizing time should be chosen when the planting materials in the pot are slightly dry and the temperature is below 30℃ on a sunny evening. It is necessary to water once in the morning the next day to keep the potting soil moist but not waterlogged. It is strictly forbidden to let the potting soil dry out.
3. Pruning and sorting.
For Cymbidiums that bloom in summer and autumn, the flower branches should be cut and nutrients replenished in time to strengthen the orchid plants. For orchids that are flourishing but not yet time to change pots, it is necessary to tidy up the orchid leaves in time. Overly dense plants can remove some weak and diseased plants, cut off diseased leaves, withered branches, and burnt leaves to promote balanced and robust growth of orchid plants and maintain their ornamental value.
4. Dividing and repotting.
Orchids are limited by the pot, and the strong root system is intertwined and difficult to extend, constantly arching towards the pot surface, making watering and fertilizing difficult. With too many plants in the pot, dense and airtight, they are not only prone to pest and disease damage but also very unfavorable for the growth of orchid plants. In such cases, repotting can be done. For summer orchids and autumn orchids, from late October to mid-November is the suitable time for repotting. When repotting, turn over the mother plant, gently remove the soil clumps, divide according to the natural plant, prune the withered roots and leaves, and be careful not to injure the leaf buds and fleshy roots. Then wash the roots with clean water and place them in a shady place. When the root color turns white and dry, repot them.
5. Disease and pest control.
The autumn climate is suitable for the occurrence of various diseases and pests. Red spiders, scale insects, and grubs are the main pests that harm orchids. A small number of scale insects can be removed with a brush, and a large number can be controlled by spraying 40% dimethoate 800-1000 times solution. If red spiders are not controlled in time, they can cause the orchid leaves to lose green and wither. Using non-toxic pesticides such as 500-600 times Green Bright solution can eliminate them. Grubs that burrow into the pot will eat the fleshy roots of orchids, and severe infestations can cause the plant to wither. A 5% phosphorus trichloride 1000 times solution can be used to灌根 control, with 150-200 ml of medicinal solution each time. In addition, autumn is also a high-incidence season for orchid soft rot, stem rot, black spot disease, etc. Agricultural streptomycin, carbendazim, and other fungicides can be alternated for spraying. Not only should the leaves be sprayed, but the surrounding area should also be sprayed with the solution.
The above is the related content of orchid autumn management for reference of green plant enthusiasts, hoping to solve your problems in green plant management.