Dendrobium candidum leaves yellow how to do Dendrobium candidum planting technology, Dendrobium candidum has a high medicinal value, there are many people who develop Dendrobium candidum cultivation, I believe that many bases planted with Dendrobium Dendrobium have encountered such problems, when planting Dendrobium candidum The leaves turn yellow, and some are dry. Do you know what the reason is? Know what to do to solve it? Let's take a look at it!
Matrix discomfort causes yellow leaves of Dendrobium candidum
[Cause] The roots of Dendrobium candidum are exposed to the air, absorbing air and rain.
[Methods] The bark is preferred for matrix materials, followed by sawdust chips, which require comminution, sterilization, and fermentation. Usually, several materials and substrates with different thicknesses are mixed.
The matrix is ​​too wet, causing the leaves of Dendrobium candidum to yellow
[Cause] Watering often causes the matrix to be too wet and the roots to smash.
[Methods] Potted Dendrobium candidum should be watered once every other week or two. After watering, usually spray, you need to control the air circulation of the balcony and other factors. The stems and roots of Dendrobium candidum are not dead, and can be re-emerged after spring warming, but watering should be controlled to prevent rotten roots.
Water shortage and drought cause yellow leaves of Dendrobium candidum
[Cause] Yellow leaves are caused by lack of water. Some growers control excessive water, and the current humidity is relatively low, resulting in yellow leaf phenomenon. Although it is winter, the water control should not be excessive, especially the bedside Dendrobium. Yellow leaf phenomenon caused by water shortage in winter is more common.
[Measures] Watering is suitable for slightly acidic to neutral water. Avoid excessive amounts of calcium, magnesium and other minerals in the water. In spring, summer and early autumn, sufficient water is required. After the Mid-Autumn Festival, it gradually enters a dormant state, and the amount of watering should be reduced until the watering is completely stopped. The watering can be reduced when the leaves have not turned yellow, and the yellowing of the leaves is further reduced, and the water is stopped when the leaves are finished. In North China, after the water is stopped, it is necessary to maintain a high indoor air humidity to prevent the fake bulbs from shrinking. If the room is too dry, water the basin once every 1 week to 2 weeks.
Too much bacteria cause yellow leaves of Dendrobium candidum
[Cause] There are too many bacteria in the matrix, and the lack of competitiveness of the symbiotic bacteria in the roots causes the leaves to yellow.
[Methods] Fermented bark or sawdust, coconut shell, bagasse, decomposed leaves or moss as a cultivation substrate must be fully dried in the sun, and treated with octyl sulfate to kill insects and insects remaining in the soil. egg.
The light is too strong, causing the leaves of Dendrobium candidum to yellow
[Cause] The environment in which Dendrobium candidum grows needs to be controlled in a humid and semi-shade place. If the sun is too strong, it will make the stone scorpion feel dry, which is not conducive to its air root respiration, so it is very important to control its planting environment.
[Methods] The light is sufficient. In the spring, summer and autumn, the amount of shading is controlled between 30% and 50%, and sufficient light can form a large number of flower buds.
The temperature is too high, causing the leaves of Dendrobium candidum to yellow
[Cause] The planting temperature of Dendrobium candidum is too high, causing the leaves to yellow.
[Methods] Dendrobium does not like too high temperatures in summer, and often stops growing in hot summer days. It should be placed in a well-ventilated place. After the flower buds grow, the temperature of the greenhouse should be kept from 20 ° C to 25 ° C during the day and 15 ° C at night. Do not be too high or too low, otherwise the flower buds may fall off.
Lack of potassium fertilizer causes yellow leaves of Dendrobium candidum
[Cause] The leaves of Dendrobium candidum begin to yellow from the tip of the leaf, and then the yellowing of the whole piece begins to fall off. This phenomenon may be due to the lack of potassium, which will make the leaves first yellow, then the whole piece Fall off.
[Measures] Spray potassium fertilizer.
Physiological causes yellow leaves of Dendrobium candidum
[Cause] In winter, the yellow leaves in the middle and lower parts of the old plants (the mature plants grown from the autumn buds of last year or this year's spring buds) are normal, so don't worry.
[Method] Don't worry about it.
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