There is a joke about sunflowers at night.

Sunflowers follow the sun during the day from east to west. What do you do at night? When the sun goes down, its head is in the west. How did it return to the East the next morning? Haircut? What a wonderful picture!

Sunflower (scientific name: Helianthus annuus L；; English name: Sunflowers): It belongs to Campanulaceae, Compositae and Sunflower. Named after the inflorescence rotates with the sun. Annual herb, 1-3.5 meters high, up to 9 meters. The stems are erect, round and angular, hard and covered with white coarse bristles. Leaves broadly ovate usually alternate, apex acute or acuminate, base with 3 veins, margin coarsely serrated, both sides rough, hairy and long handle.

growing environment

The habitats of wild sunflowers are mainly grasslands and dry and open areas. They grow along roadsides, fields, desert edges and grasslands. It grows best in sunny, humid or disturbed areas. Wild sunflower is resistant to high temperature and low temperature, but it is more resistant to low temperature, and the optimum temperature range is between 2 1-26℃.

Sunflowers have low requirements on soil, and can grow on all kinds of soil, from fertile soil to arid land, barren land and saline-alkali land. Not only has strong saline-alkali resistance, but also has salt absorption performance. It can thrive in alkaline soil and has strong drought resistance.