Skills of growing orchids in summer

Summer with the temperature rise, all kinds of orchids into the peak growth period, then should do a good job orchids summer heatstroke prevention, fertilizer and water management and pest control work, so that orchids safe summer.

Shading into summer, whether it is open field cultivation or indoor orchid cultivation, must shield strong light. Shades should be erected, such as bamboo curtains, reed curtains, etc., opened in the morning and evening to receive scattered light from dawn and sunset. Semi-open orchid cultivation places need all-day astigmatism, line art orchid needs 15% of all-day sunlight. In order to accelerate the growth of orchid buds, let them receive 1 hour of weak light in the morning and evening, and strengthen shading and heatstroke prevention in hot weather. Whether it is the ground or the sun platform, morning and evening should often sprinkle moisture to cool down. Orchid breeding places to strengthen ventilation, be sure to make the air fresh.

Watering in orchids growth peak period, summer once water shortage, then pot orchid growth is poor, orchids need eight minutes dry, two minutes wet. Watering should be based on the principle of "watering dry, stopping wet, properly dry". Water must be poured thoroughly, not half water. The number of watering can be determined by the planting material of the potted orchid. Such as volcanic stone, red brick particles, floating stone and other hard hydrophobic plant materials, water can be supplied once a day; pond mud, humus and other highly absorbent plant materials, water can be supplied once every two or three days. Watering is generally carried out in the morning or evening, and it is forbidden to water and pour at noon. It should be clean and pollution-free, slightly acidic water (pH value 5.5-6.5). Orchid rotten roots, leaf black spots, leaf bud rot and other morbid, more and improper water supply.

Fertilization Generally speaking, green leaf varieties should be applied nitrogen, phosphorus, potassium balance fertilizer, line orchid is only suitable for phosphorus and potassium fertilizer. At the beginning of summer, liquid fertilizer should be applied every 10 to 15 days. When the temperature is higher than 30℃ in hot summer, all kinds of orchids should stop applying fertilizer. Fertilization should not be applied during the period of flowering or flowering. No matter what kind of organic fertilizer is applied, it must be fully fermented and decomposed, and diluted with clean water. Fertilization time is best in the evening, and then spray water once in the morning the next day. Leaf is yellow and thin is lack of fertilizer, should topdressing; black leaf tip withered coke is too much fertilizer, should stop fertilizing. In summer, every 10 days or so, spray 0.1% potassium dihydrogen phosphate once, foliar fertilizer, within one or two hours, water can be used to irrigate the pot orchid, in order to remove the excess fertilizer, to avoid its aggregation roots so that the root rot.

Pest control In summer, when rain is abundant and air humidity is high, the environment of orchid planting place is too humid, and the material in the pot becomes acidic, which is easy to breed various diseases. If black spot, white silk disease and anthracnose are found, the diseased plants and leaves should be removed in time, and ventilation and light transmission should be strengthened to reduce environmental humidity. Summer is prone to white silk disease, available 1:1:100 Bordeaux solution irrigation roots, but also in the roots of some plant ash or lime. Black spot and anthracite can be controlled by spraying 50% carbendazim 500 - 800 times or 70% thiophane 800 times. Red spiders, aphids, scale insects occur, should promptly cut off insect branches, insect leaves, reduce insect sources. 40% omethoate or 50% malathion 1000 times solution can also be used to control, continuous spraying 3 times, the effect is good.