What kind of plant is sunflower (double sunflower)

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Sunflower is a plant in the Asteraceae family and is named after its flower disk that rotates with the sun. Double sunflower is a variety of sunflower, also a plant in the Asteraceae family and Helianthus genus. It is native to North America and later introduced to my country. It is an annual plant. The plant is shorter than ordinary sunflowers, and the flowers are larger and more colorful than ordinary sunflowers. It can be eaten and extracted for oil, but its economic value is not as good as that of ordinary sunflowers.

1. What kind of plant is sunflower?

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

2. Introduction to Double Sunflower

Double sunflower is a variant of sunflower, a plant in the Asteraceae family and Helianthus genus. It is native to North America and later introduced to my country. It is an annual plant. Compared with ordinary sunflowers, the plants are shorter and the flowers are larger and brighter than ordinary sunflowers. The flowers are double, golden in color, compact and hydrangea-shaped, 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 extracted for oil, but its economic value is not as good as that of ordinary sunflowers.

3. How to plant double sunflowers

< p>The planting method is roughly the same as that of ordinary sunflowers, and the difference between the two is small. The best time to sow is in summer when there is sufficient light and rain, and the temperature should be maintained at around 20°C. After the seeds germinate, the seedlings need to be hardened. At this time, the water needs to be properly controlled, but the soil should not be too dry, otherwise the seedlings will wilt. There should also be sufficient light and no shade. You can water some thin fertilizer and water to ensure the seedlings grow strong.

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