What kind of plant is sunflower (double-petal sunflower)

1. What kind of plant is sunflower?

Sunflower is a plant of the Asteraceae family, genus Helianthus, and is named because its flower disk rotates with the sun. Its plant is generally 1-3.5 meters tall, and can reach up to about 9 meters. It is an annual herb. It has strong adaptability and low soil requirements and can grow on all types of soil. It can tolerate high and low temperatures, and is more resistant to low temperatures. The optimal temperature range is between 21-26℃. The flowering period is from July to August. It has two main functions: edible and ornamental.

2. Introduction to Double Sunflower

The double sunflower is a variety of sunflower, a plant of the Asteraceae family, Helianthus genus. It is native to North America and was later introduced to my country. It is an annual plant. The plant is shorter than ordinary sunflowers, but the flowers are larger and brighter than ordinary sunflowers. The flowers are double-petaled, golden in color, tightly packed in a hydrangea shape, with a disk diameter of 10-13cm and a large number of flowers. The flowering period is from March to November, and the flowering time is long. It can also be eaten and pressed for oil, but its economic value is not as high as that of ordinary sunflowers.

3. How to plant double-petal sunflowers

The planting method is roughly the same as that of ordinary sunflowers, with little difference between the two. The best time for sowing is in the summer when there is sufficient sunlight and rainfall, and the temperature should be kept at around 20℃. After the seeds germinate, the seedlings need to be hardened. At this time, the water needs to be properly controlled, but the soil cannot be too dry, otherwise it will cause the seedlings to wilt. There should also be sufficient light and no shade. You can water it with some dilute fertilizer water to ensure that the seedlings grow healthily.