Native to tropical America, Chihuahong likes sunny, hot and dry climate conditions, likes loose and fertile soil, is not strict with environmental conditions, is strong in nature, is not cold-resistant, and dies as soon as it encounters frost.
Annual erect herb, 20-60 cm high, stout stem, branched, slightly quadrangular, gray rough, denser when young, slightly enlarged nodes. Leaf blade is papery, oblong or oblong obovate, 3.5-13cm long and1.5-5cm wide, with sharp or blunt tip, convex tip, tapering base, wavy edges, small spots, white villous hairs and marginal hairs on both sides, and long petiole1-/kloc-. The flowering period is July 7- 10/October.
1. Propagation methods: The propagation methods of Euphorbia helioscopia include sowing propagation and cutting propagation.
Sowing, amaranth cultivation is very simple, usually in September 9- 10/October, sowing in April-May of the following year, and planting in June. Sowing can be carried out from April to May every year, and seedlings can be transplanted. If seedlings are raised in greenhouses or indoor warm places, sowing can be advanced to February. Before sowing, planting should be treated, because the seeds of Euphorbia zingiberensis are crisp fruits with perianth and hairy outside. Soaking the seeds in cold water for1-2 days before sowing can significantly improve the emergence rate. Sowing methods are commonly used, such as drilling, furrow sowing or box sowing. It is advisable to cover the soil with no seeds after sowing, and cover with grass curtain or plastic film to keep the bed soil moist. Generally, the seeds can germinate in 8-10 days. After the seedlings with about 10%, the mulch should be removed in time, and at the same time, the weak seedlings, overgrown seedlings and miscellaneous seedlings should be removed. Keep air circulation and sufficient sunshine, so that a bunch of red flower seedlings can grow rapidly.
The method of cutting propagation is to use twigs to cut in the courtyard or flowerpot from May to August. After cutting, a shed is built to keep the soil moist, and it can take root in 20-25 days, and it can blossom in 2 months after planting1-.
Second, planting, when there are 3-4 pairs of true leaves, the thousand-day red flower seedlings can be planted around the flowerpot or the courtyard dam. If the plants are planted continuously, the spacing between plants should be about 33 cm, so as not to plant them too closely, so as not to affect ventilation, and powdery mildew will be serious in the later stage.
Third, water and fertilizer management: after transplanting, the seedlings should be watered frequently to keep the soil moist, and they don't like big water during the growing period. If the amount of water is too much, yellow leaves are prone to fall. Water should be "thoroughly watered" to facilitate the growth of roots. When the growth is vigorous, the amount of water should be increased and liquid fertilizer should be applied twice, and thin decomposed human manure water, decomposed cake fertilizer water and other topdressing methods are commonly used.
Fourth, daily management, in order to promote the low plant height and increase the number of branches and flowers, topping and pruning should be carried out several times in the seedling stage. Paying attention to drainage in rainy season, often cultivating weeds, keeping soil loose, reducing water evaporation and promoting air circulation are important tasks to ensure the rapid and robust growth of Salvia splendens seedlings.