This season is a good time for azalea cultivatio […]
This season is a good time for azalea cultivation. The following is summarized by the editor: Rhododendrons are tender and beautiful. First, familiarize yourself with the growth environment of the rhododendron soil. The pH value is between 5.5 and 6.5. Avoid the fertilization of copper sulfate in alkaline or clay soils. The suitable growth temperature is 12℃~25℃, shading into summer, antifreeze, and warm in winter, it is best to enter the room. According to the above details and carefully cultivated, the azaleas will be very gentle and beautiful.
The cuckoo is like fertile soil. It is the most suitable to cultivate rhododendrons using years of withering and accumulating decaying acid humus.
Clay has poor permeability and poor drainage, so it is not suitable for use, especially soil with lime powder.
The top dressing does not pursue alkaline fertilizers. After acidification of lard and other oils, buried in the soil, the rhododendron can grow stronger, bloom, and have a brighter color. Use nitrogen, phosphorus, and potassium correctly. Adequate nitrogen fertilizer, dark green leaves, strong growth. Nitrogen deficiency, light leaves with a light color, thin and old leaves, short and thin buds, flowers, and a small number of small nitrogen fertilizers can all cause excessive growth. Phosphorus plants are strong, with flowers, beautiful colors. Phosphorus deficiency, fewer and thin branches, thin petals, short flowering period. Rhododendron has slightly slender branches and soft tissues when it lacks potassium. When appropriate, the more nitrogen and potassium fertilizers on the trees, the more trees the more phosphorus fertilizers. If the soil has been alkalized, resulting in chlorosis and yellowish-white leaves, copper sulfate should be added. Fertilizers should not be concentrated. Fertilizer treatment facility. Too much liquid fertilizer will burn roots and make plants suffer.
Rhododendrons are afraid of drying and waterlogging. If the rhododendron flower pot is too long, the root side shrinks, the first leaf droops or curls, and the tip become a burnt yellow leaf, and it cannot recover for a long time and becomes more and more dead. The soil in the basin is moist and well ventilated, causing rot, bright yellow leaves, early autumn, growth halt, and severe death.
If the rhododendron flower pot is caused by the root cause due to dry soil, even if the root of the basin is soaked in water, it can be placed in the shade of the tree and a few drops of water on the leaves. If there are too many yellow leaves due to early autumn, the affected plants should be placed in a ventilated place, watering and watering frequency should be controlled, fertilization should be stopped to prevent pests and diseases.
Rhododendron is like a humid environment, and there should always be leaves and some moisture around the basin to keep the surrounding environment moist. If the surrounding environment is dry, azaleas are susceptible to diseases. The knot disease is when the rhododendron enters the pit under the vine. There is good glass on the top. The pit is often watered. The branches and leaves of the grape can pass through the oblique light, and the diseased flowers will slowly return to normal.
Rhododendrons should be dried more after their buds, but care should be taken during the flowering period. Direct sunlight must be avoided. The light will dilute the color and the flowers will wither early. Need diffuse lighting and good ventilation.
Rhododendron is one of the representatives of acidic plants. The pH value of 5.5~6.5 is the best. In a cool, humid, and well-ventilated environment, the suitable growth temperature is 13℃~25℃, and the growth period is maintained at 60% to 70%. The relative humidity of the air, when the relative humidity of flowering is as high as 80%. Rhododendrons love light, but avoid direct sunlight, appropriately increase spring shadows to reach about 70% shade in summer, and often humidify and cool the water surface. Outdoor azaleas should be protected outside for ventilation. Rhododendron's weak fat, but thick fertilizer, thin fertilizer growing season, the best fertilizer, such as soybean water, water, and various horseshoe palm vegetables, chicken feathers, fish innards, and other liquid fertilizer residues after soaking can be administered. Rhododendron is a fibrous root, slender and weak, so heavy clay, loose, air-permeable, and air-permeable acidic soil cannot be used. The north can be mountain mud, larch leaf soil, artificial cultivation soil, and other leaf molds. The flowers are pruned, the purpose is to make the flowers more beautiful and control blooming, cutting annual branches can also be cut to reproduce.
If the rhododendron leaves the yellow color positive, the red insect spots on the back will fall leaves more serious than the red spider damage. You can spray with 40% trichlorfon 1000 times for seven days, three times in a row. If the leaves are yellow and the veins are still green, the symptoms of copper deficiency can be sprayed with copper sulfate solution for about 10 days, and the concentration does not exceed 5. Naomi Shui with good vinegar and fermentation can also have a certain effect. Also, there are other symptoms, such as dry leaves, red-brown dry tips, gradual expansion, direct sunlight, poor ventilation, and high temperature, which can be prevented and cured due to the improvement of the environment. If there is brown spot disease, use chlorothalonil, carbendazim, which can kill thiophanate-methyl as the basis for control. The leaves are yellow or very green, but if you touch the branches lightly, the leaves will impulse and fall, and quickly drop the light, which is too dark and disgusting; the light is too weak, the air is too dry, and the situation caused by air pollution can be seen and prevented. Rhododendrons are wilting and drooping. The yellowish hair of new leaves is a long-term root caused by water. If the leaves are wilted, but they are still green, they are not easy to fall. It is also caused by water. Uneven size of leaves or black membrane spots, mostly black spots, caused by bacteria, mainly due to water, poor ventilation, too weak light. Due to the combination of bacterial infection factors, it can change the environment and drug control. Drugs can refer to brown spot treatment.