Many varieties of tropical orchids require different fertilization, and how to prevent and control diseases and pests in edible fungi?

Tropical orchids belong to the tropical and subtropical epiphytic orchids, and are today a fashionable high-grade indoor ornamental flower worldwide. They have large, brightly colored flowers, peculiar flower shapes, and a flowering period of several months. They do not need soil cultivation, nor do they need organic fertilizer (only spraying with a chemical fertilizer solution is required). They are clean and hygienic, with numerous varieties (they can be divided into 7 major categories totaling more than 500 varieties), suitable for indoor cultivation, and both flowers and leaves have extremely high ornamental value. In recent years, various regions of China have introduced tropical orchids for cultivation and propagation to supply the market, and the market prospects for tropical orchids are very promising. Tropical orchids have many varieties and different fertilization requirements, and the fertilization techniques for tropical orchids are introduced as follows:

Paphiopedilum Paphiopedilum needs a relatively small amount of fertilizer, and generally only needs fertilization during the growth period. After new shoots sprout in the growing season, a dilute cake fertilizer solution can be applied once every 3 to 4 weeks, or a small amount of Huaxian granular flower fertilizer can be evenly applied around the pot, which can make the leaves lush and the flowers bright. Fertilization should be stopped during the dormant period to allow sufficient dormancy.

Cymbidium orchids For fertilizing Cymbidium orchids, 3 methods can be used: first, mix the fertilizer in proportion with the planting medium for their growth and development; second, dilute the prepared fertilizer into a solution and pour it into the planting medium in several applications; third, make the prepared fertilizer into solid granules or fertilizer blocks and apply them to the pot surface. In seasons with sufficient sunlight, more fertilizer should be applied to ensure the needs of vigorous orchid growth, while in dark, cold, or rainy weather, fertilization should be reduced or completely omitted.

Phalaenopsis Phalaenopsis needs relatively little fertilizer, and generally the principle of "thin fertilizer, small amount, frequent application" should be followed. The main points are as follows: spring and summer are the vigorous growth period, and a dilute solution mainly based on nitrogen fertilizer can be applied once a week; autumn and winter are the flower stem growth period, and a dilute liquid fertilizer mainly based on phosphorus and potassium fertilizer should be applied once every 10 to 14 days. A 0.5% calcium superphosphate aqueous solution can also be applied; after buds appear, fertilization should be stopped, otherwise buds are prone to drop early.

Dendrobium Dendrobium likes fertilizer but should be given thin fertilizer and frequent fertilization. During the seedling stage, a dilute fertilizer solution with relatively high nitrogen content is suitable, with a concentration of 20% as appropriate, applied once a week. After the seedling stage, the plant grows faster, and a dilute liquid fertilizer with relatively complete nitrogen, phosphorus, and potassium nutrients can be applied once every 2 weeks, with a concentration of 20% as appropriate. When fertilizing, it must not splash onto the leaves.

Cymbidium Cymbidium is the type among all orchids that likes fertilizer the most. During the vigorous growth period, a dilute fertilizer solution (cake fertilizer water is also acceptable) should be applied once every two weeks, or solid granular fertilizer can be placed in the substrate at the edge of the pot in spring and summer to slowly release nutrients for long-term absorption by the root system. During the seedling stage and low-temperature seasons, organic fertilizer should be applied less or not at all, and a 7:6:19 nitrogen-phosphorus-potassium compound fertilizer can be used for foliar spraying, with very good results.

Cattleya Only with appropriate and timely fertilization can Cattleya seedlings grow robustly and the flowers be brightly colored. The methods are as follows: 1. Light fertilizer is suitable. Its concentration is generally 50% to 80% of flower fertilizer. Fertilization can be carried out 1 week after new shoots emerge, and for small seedlings the principle of "small amount, frequent application" should be maintained. 2. During the growth period, a fully decomposed extremely dilute cake fertilizer solution can be applied once every 10 to 15 days. When fertilizing, note that it must not be applied to the leaves or tender buds. A few grains of fermented extremely dilute cake fertilizer can also be evenly placed around the pot each month for absorption. 3. For orchid plants that have reached flowering age, during the flower bud differentiation period, appropriately more phosphorus and potassium fertilizer should be applied to nourish the roots and support flowering, improve photosynthetic efficiency, and promote tough leaves. (Source: Nongbo Network)