1, shape characteristics

Sunflower is a unipolar plant, its stem grows upright and has no branches. The plant height is between 1-3.5m, and the mature plants are higher than people. Some ornamental sunflowers have short plant types, many branches and full plants. Edible sunflowers are independent stems with wide and rough leaves and serrated edges.

The flower diameter of sunflower is between 10-30cm, and only one flower can bloom in each inflorescence, with a disk in the middle and petals on the periphery.

2. Habitual characteristics

Sunflower is an annual flower, which begins to sprout and grow in spring and enters flowering in July in summer. Its flowers are open to the sun. Flowers always move with the sun. After flowering for a period of time, fruit will bear in the middle of the flower tray, which is the melon seeds we eat.

3. Breeding characteristics

Sunflowers like warm and hot environment, and the breeding temperature is 20-30℃. Keeping the light at ordinary times, direct sunlight can promote their rapid growth. The growth of sunflower needs more water, so we should pay attention to watering at ordinary times and topdressing during the growth period.

Control disease

During the growth of sunflower, it is easy to be infected with white rot, which affects the yield and variety of the plant. When sunflower is found to be infected with germs, it needs to be pulled out and destroyed immediately to prevent the spread of germs. Before the sunflower germinates and blooms, it needs to be sprayed with fungicides to remove germs.