Sunflower planting: how to plant ornamental sunflowers?

How to plant ornamental sunflowers? Please give me some advice on how to enjoy sunflowers in a warm, slightly dry and sunny environment. The suitable temperature for the growth of sunflower is 21 ℃-27 ℃ in daytime and 10 ℃-16 ℃ at night. The temperature difference of 8 ℃-10 ℃ was the most beneficial to the growth of stems and leaves. The soil should be loose and fertile, and the mixture of cultivated soil, rotten leaf soil and coarse sand should be used in pot cultivation. Ornamental sunflowers can be sown all year round. If you use flowers in May, sow in February-March; use flowers in October and sow in August. The seeds of ornamental sunflower are large, with 25 ℃ 50 seeds per gram, and the optimum temperature for germination is 21 mol-24 ℃. Hole sowing is often used in the open field, sowing plate is sown on demand, and 7muri germinates 10 days after sowing. The germination rate is 80% and 90%. Take potted dwarf species as an example. It takes 60 days from sowing to flowering. According to the size of the aboveground crown, the ornamental sunflower chooses a basin of 10ml 15cm. Fertilize once every ten days during the growing period, or use "Huiyou" 15-15-30 potted flower special fertilizer. If you watch the flower bed, you can pick the heart once, and the branches can produce 4 murals and 5 flowers. Potted plants are not branched, and a single flower is better. The height of tall stalk varieties can be controlled by spraying leaves with 0.25% Mel 0.4% longer solution 20 days after germination. Sunflower cultivated in the open field has a long light time and often blossoms a little earlier, while when cultivated in the greenhouse in winter, the light time is short and the flowering is delayed. Double petal varieties are not easy to bear fruit, and artificial pollination is needed during flowering, which can improve the seed setting rate. Planting ornamental sunflowers needs to control powdery mildew and black spot, which can be controlled by spraying 500 times of 50% topiramine wettable powder at the initial stage. Insect pests are harmful to blind bugs and red spiders and can be sprayed with 1000 times of omethoate EC. Click to get more sunflower planting techniques click to get more food crop planting techniques