Ten points for attention in cultivation techniques of rhododendron

First, like yin and fear yang, strong light is easy to burn, but excessive shading will cause poor growth and flower buds are not easy to form.

Second, the pH value of acid-loving soil is about 6; when the alkalinity is too strong, the soil will go from bottom to top, gradually wither leaves and even die.

Third, physiological iron deficiency, chlorophyll synthesis is affected, the leaves will become smaller, showing yellow-white.

Fourth, generally can withstand the low temperature of less than 10 ℃, but because the rhododendron root is shallow and thin, close to the topsoil, it can not stand the heat.

Fifth, due to the slender root system, poor water absorption and supply capacity, and fear of drought and waterlogging, it can only grow well when the air humidity is 70% to 90%.

Sixth, watering should be appropriate. If the surface is wet and dry, the root system will be damaged and the old leaves will fall early; if the stagnant water rotten the roots, the new leaves will be white and yellow; the flowering period will be short of water and the petals will droop; when the leaves are short of water, the heart leaves will curl and the leaves will turn yellow.

7. Lack of nitrogen fertilizer, thin leaves, thin branches, few flowers; lack of phosphate fertilizer, some leaves are reddish purple and easy to fall; lack of potassium fertilizer, old leaves are gray-green, leaf edges are yellow-green, leaves appear spots, and eventually turn brown, even scorched and fallen leaves.

Eighth, if the fertilizer is too thick and sufficient, it will cause the phenomenon of reverse osmosis, the root of the beard will atrophy due to the loss of water, the leaf tip and edge will lose luster, and the focus will gradually fall off.

Ninth, poor ventilation, air blockage, causing fallen leaves.

For fear of snow and frost, it is appropriate to overwintering at about 8 ℃; if the room temperature is too high to dormancy, the physiological activity does not decrease, and continue to consume a large amount of nutrients, it will be disadvantageous to the growth and development of the following year.