How to prevent the Jiao Tip of National Orchid Hemp leaves

The orchid leaves are exuberant, green and sturdy, with graceful appearance and divine shape, which is pleasing to the eye. If the orchid leaf tip scorched leaves withered, disease spots, like a piece of psoriasis, even if it is exotic, it will be greatly inferior. To raise orchid leaves well, I have made improvements from the following six aspects.

First, the basin soil should be breathable, diuresis and moisturizing. The aggregate has a good structure, soft and loose, shaped like a sponge and medium fertility, preferably mountain rotten leaf soil or peat soil; if you can't get it in the city, you will prepare your own nutritious soil. The formula is as follows: 8 parts of ① edible fungus residue, half part of honeycomb coal ash, half part of retted bone meal or withered cake, 6 parts of ② ripened sawdust, 3 parts of honeycomb ash, 1 part of vegetable garden soil and proper amount of withered cake, 6 parts of grain hull retted and sterilized by ③, 3 parts of honeycomb ash, 1 part of medium sand and withered cake. All three must be mixed well and used. The commonness of the three is good air permeability, diuresis, moisturizing, soft and loose, which is conducive to the growth and development of orchid seedlings.

Second, watering should be reasonable. Tap water and well water (soft water) can be used after precipitation, volatilization or exposure. When watering, you should look three times: first, see whether the topsoil of the basin is dry and white, and stop if it is wet; second, if the topsoil is dry and white in winter and spring, it can also be watered the next day, with high temperature in summer and autumn, strong sunshine, 1000 topsoil in the morning and spray foliar water in the evening; look at the size of the basin, the quality of the basin, the watering of the small basin, the slow watering of the big basin, the watering of the mud basin, the porcelain, the glaze and the plastic basin.

Third, rational fertilization. Orchid seedlings are very sensitive to fertilizer, and their resistance to fertilizer is poor. Farm manure is the main fertilizer, and light is the best. More fertilizer and higher concentration have a reverse osmosis effect on Langen. Cause water inversion, root system withered and rotted. Topdressing should be made up and watered the next day to keep the residue from gathering on the pocket. Orchids have symbiotic nitrogen fixation by orchids, so it is generally not necessary to apply nitrogen fertilizer. There are three kinds of topdressing for orchid cultivation: no fertilization for newly planted orchid seedlings within half a month, no fertilization for orchid plants during dormancy period, and no topdressing for orchid plants in hot sun. Top dressing with foliar spray, with 0.1% potassium dihydrogen phosphate, or vinegar 1 part, add 500 times water spray leaves on both sides. Rice vinegar contains acetic acid, lysine and glutamic acid, which promote the growth of orchid seedlings, enhance photosynthesis and reduce transpiration consumption.

Fourth, the sun should be soft. Orchids are semi-shade plants, which need scattered light, like morning light and sunset, and are afraid of direct sunlight. From Lesser Heat to the Beginning of Autumn, there is often a hot sun above 35-39 ℃, or even an "autumn tiger" over 40 ℃. The physiological function of bluegrass is blocked, especially continuous high temperature, resulting in semi-dormancy or dormancy of plants, and it is difficult to form leaf buds and flower buds. The sun is scorching in summer and autumn, be sure to give 80% shade to Orchid Miao, or move the basin to the place where there is scattered light. In winter and spring, you should receive all-day sunshine. The suitable temperature of orchid seedlings is 12: 18 ℃, and the growth of orchid seedlings is blocked above 35 ℃, which is the direct cause of the physiological diseases of orchid leaves, hemp leaves and scorched tips.

Fifth, ventilation should be good. The place where the orchid pot is placed should be air convection, a breeze blowing, and the orchid leaves tremble slightly. The maintenance and placement of flowerpots is not crowded, put in a single line as far as possible, keep the distance between pots 5 cm, and keep more orchids, it is best to put them on the shelf, or hang in the air to ensure ventilation on the left and right sides of the top and bottom.

Keep the orchid leaves clean. Orchid leaves are the main organs of photosynthesis, respiration and transpiration of plants. Keeping the leaves clean is an important work of orchid cultivation.