Sunflower is named for its flowers, often facing the sun. Another reason is that its golden flowers are like a sun when they are open. Sunflower was originally produced in the tropics, but it has strong adaptability to temperature. It is a warm and cold-tolerant crop, and its seed is resistant to low temperature. Sunflowers can be grown in all seasons, mainly in summer and winter. The flowering period can be more than two weeks. In addition to its appearance like the sun, the sunflower is…
