To increase the survival rate of nutrient solution, first soak it in hot water to avoid tissue fluid overflowing, and add some chemicals. In addition, soaking in tea can be more vivid.
Sunflower (Latin: Helianthus? AnnuusL。 ) is a plant of the genus Helianthus in Compositae. 1 ~ 3.5m high. 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. Head inflorescence, diameter 10 ~ 30 cm, solitary at the top of stem or branch.
The involucral bracts are multi-layered, leafy, imbricate, with long bristles, bloom in summer, and have neutral yellow tongue-shaped flowers at the edge of inflorescence, which do not bear fruit. The middle of the inflorescence is a bisexual tubular flower, brown or purple, which can bear fruit. Achenes are oval, lignified, gray or black, and are called sunflower seeds.
Native to South America, the domesticated species was brought to Europe from North America by the Spanish in 15 10, and was originally used for viewing. /kloc-It was introduced back to North America from Russia at the end of 0/9. It was cultivated in China. Sunflower seeds are called sunflower seeds and are often fried as snacks. They are delicious, sunflower seed oil can also be squeezed out to eat, and oil residue can be used as feed.