1. The suitable temperature for seed germination is 18 ~ 24 ℃, and the seedlings can emerge in 3-4 weeks. Sowing and propagation can be carried out in other three seasons except winter, usually in spring from March to April and autumn from September to October, and can also be carried out with harvesting and sowing. In January of the next year, the seedlings in the greenhouse can be planted in the open in April and bloom in autumn.
2. In spring and autumn, the roots can be cut and planted independently. Proper amount of organic fertilizer should be applied for cultivation. Under the natural temperature sowing, the next year can bloom. Before sowing, turn the whole basin deep, pave the basin soil, then drill and cover the soil, pour enough water, cover and move it on the balcony with plastic film, keep the humidity in the basin, and sprout in about 2 weeks.
3. Vermiculite can also be used for sowing and propagation, and then plastic film can be used to place the watered substrate in the leeward and sunny place. In the first year, the seedlings are still small. In the second year, the number of flowers will increase, and the flower stems will be produced, with 3-5 or more flowers.
Torch flower potted for three years, a cluster can produce more than ten evil buds, too much production, resulting in congestion, poor ventilation, need to be divided in time.
Most of the ramet propagation is carried out in autumn. After the flowering period, the whole mother plant can be dug out, and 2-3 buds can be divided into one plant and cut off. After the planting, watering can be done. The method of ramet propagation is simple, easy to survive, does not affect flowering but has a small amount of reproduction.
