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The torch flower is warm and humid, and it is also resistant to half shade. Sandy loam with deep, fertile and well-drained soil is required. More cold-tolerant. Torch flowers are cultivated in many fields, but they can also be potted. The planting place should choose a clay loam with high dry terrain, leeward sun and rich humus. Apply some decomposed organic fertilizer before planting, increase phosphorus and potassium fertilizer and then deepen the soil.
The seedling height is about 10cm, and the plant spacing is 30cm×40cm. After planting, the water is poured twice, then the cultivating, loosening, and seedlings are used to promote new roots. In the summer, if you need sufficient water supply and top dressing, you will grow rapidly. Under the condition of sufficient sunlight at 25-28 °C, you can head and flower for about 5 months. When the flower stem appears, the root dressing of 2-3 times potassium dihydrogen phosphate should be carried out. The interval is 7 to 10 days, the concentration is 0.1%; or the concentration of 1% to 2% calcium superphosphate is used as the soil top dressing. Once, you can increase the stiffness of the stems and prevent bending. In the autumn, the squash and the planting should be applied with more base fertilizer to supplement the nutrient deficiency in the plant.
The wintering ability of the torch flower is closely related to the accumulation of nutrients in the body. After the flowering, the residual flower branches should be cut off as early as possible to avoid the consumption of nutrients. In the arid areas of winter and spring, water should be perfused before freezing, and the plants should be covered with hay or fallen leaves to prevent dry and frozen death. It is necessary to remove the cold cover in the early spring, and pay attention to the cold spring attack to prevent the plant from being damaged. Torch is a light-rooted flower with a slightly fleshy root and less root hair. The roots are densely clustered for a long time, the number of root hairs is reduced, and the absorption capacity is reduced. Therefore, it must be replanted every 2 to 3 years to promote the growth of new roots. Improve the absorption capacity of roots. The planting time is best from late September to early October. Winter winter should pay attention to watering the winter water, piled up or covered with deciduous plants.
There are mainly rust damage to leaves and stems. At the beginning of the disease, it is sprayed with lime sulphur mixture or with 25% rusting emulsifiable concentrate 400 times. Promote cultivation: In the production of cut flowers, the flowering period should be extended as much as possible, and the planting control can be carried out by staged sowing and staged transplanting. The natural flowering period of the torch flower is from late May to mid-June. If the seedlings of the previous year are transplanted and planted in the second year from April to June, they can bloom in September-October.
When transplanting the seedlings, pour the water twice, cultivate the loose soil seedlings, and promote the new roots. Planted in 25-28, the base fertilizer should be applied. Watering in time after planting, vigorous growth in spring and summer, and fertilization once a month. Water should be poured before flowering to keep the soil moist. Watering can be reduced after flowering, and the tip of the old leaf turns red or withered after the first frost, but it remains green. Cover the ground with hay or loam in winter to prevent frost damage.
The greenhouse was planted in January, planted in the open field in April, and flowered in the summer from July to August. Appropriate amount of base fertilizer should be applied before planting. After seedling transplanting or ramets, water should be irrigated 2~3 times, weeding should be carried out in time and the soil should be kept moist. When the flower buds appear, it should be applied 2~3 times 0.1% potassium dihydrogen phosphate root top dressing The interval is 7~10 days, or 1%~2% of calcium superphosphate is applied once to enhance the firmness of the flower bud. It is necessary to increase the irrigation before the flowering period, and stop the watering after the flowering. Torch flowers have strong cold tolerance, and the open field cultivation should cover the grass to keep warm, so as to facilitate safe wintering.
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