How to Revive Weak and Sickly Orchids? Gardening Tips to the Rescue

       Duringorchid cultivation, it often happens that due topests and diseases, overly frequent division,improper cultivation, and plant aging, orchid seedlings grow slowly and show symptoms such as yellowing leaves, root rot, and bud rot. If rescue measures are not taken in time, these weak and sickly orchids will lose their ornamental value and eventually wither and die. This is especially true for some rare varieties, which, once gone, are hard to find again. Rescuing weak and sickly orchids is indeed an issue worthy of attention for orchid lovers. Below are some successful experiences shared for the reference of fellow orchid growers. I. Strict Disinfection Remove the orchid seedlings from the original pot, discard the old soil, and carefully wash the root system. Use scissors sterilized by flame to cut off residual roots, dead roots, and rotten roots, then soak them in a 0.5% thiophanate-methyl or potassium permanganate solution for 5-10 minutes, drain and air-dry in the shade. Repeat this process two to three times to thoroughly kill the pathogens. Note that when disinfecting by soaking the roots, the solution should just cover the pseudobulbs; do not let water accumulate in the leaf hearts. At the same time, the above solution can be diluted 5 times and sprayed on the leaves for disinfection. II. Change the Pot For planting and caring for weak and sickly orchids, clay pots and purple clay pots are the first choice. It is best to use unused new pots, because old pots will inevitably retain some fungi and bacteria that cause orchid diseases. If old pots must be used, it is safer to wash them clean and sun-dry them for several days or scald them with boiling water before use. Use a pot pad at the bottom of the pot for drainage and aeration. You can buy a dedicated drainage cover, or use natural materials such as peach pits and walnut shells. The height of the pot pad should account for 1/3-1/2 of the pot height, and the pot volume should be small rather than large. The root system of weak and sickly orchidsisrelatively fragile; if the pot is too large, it easily causes water accumulation, leading to orchid root rot. Using a small pot can avoid this problem. III. Choosing the Substrate Weak and sickly orchid seedlings have poor adaptability. Thecultivationsubstrate should preferably be a granular substrate with medium fertility, low fat content, and good ventilation and permeability, such as ceramsite, expanded clay, coarse sand, crushed brick pieces, Emei immortal soil, crushed stone, etc. You can also wrap the roots and pseudobulbs of the orchid plant in sphagnum moss and then plant them in a pot filled with the above substrates; the effect is also quite good. All substrates must be disinfected before use. It is not advisable to use humus soil to plant weak and sickly orchid seedlings. First, humus soil is collected from forest areas and contains many miscellaneous bacteria, making it difficult to thoroughly sterilize. Second, after being used for a period of time, humus soil tends to compact, with poor permeability, which is unfavorable for orchid root growth. IV. Regulating Temperature and Humidity Weak and sickly orchid seedlings should be planted slightly deeper to protect the pseudobulbs and maintain moisture. The substrate in the pot should be kept in a moist state; too much or too little water is unfavorable for the recovery of orchid seedlings. During the dormancy period, the substrate can be appropriately increased, usually covering the pseudobulbs, to keep the pseudobulbs moist and provide frost protection. When the temperature rises above 15°C the following spring, the substrate added in the previous winter should be promptly removed to facilitate the sprouting of new buds. Normally, the temperature should be maintained at 18-28°C. Orchid seedlings should be placed in a location with visible scattered light, avoiding direct strong light. Water basins and water troughs can be placed around the orchid pots to increase environmental humidity.