Zinnia (Zinnia, Steptogo, Backgammon, Fireball, Chroma) is an erect annual herb with a plant height of 40-120 cm and hairy stems. Lateral branches were squamous branches. Leaves opposite, sessile, ovoid, flowering in summer and autumn, single head of flower head inflorescence, flower diameter of about 10 cm, tubular yellowish-brown purple flowers, tongue-shaped flowers in addition to blue, all colors are. Achenes and seeds weigh 2.8-11 grams. Suitable for planting in flower beds, flower mirrors, dwarf species can be potted. Zinnia is also an excellent cut flower material.
Zinnia petals have a variety of colors, long flowering periods, and varied flower patterns. They are basically double-flowered species.
The hundred days of grassland production in Mexico is strong, resistant to drought, hi to sunshine, and fertile soil. Avoid the heat. Poor growth in rainy summer conditions and poor drainage.
Spring sowing is carried out in March-April, when 4-5 leaves are transplanted, and the spacing is 10 cm. Planted at the beginning of June, 3030 cm spacing. 10 times human fecal urine was applied every 10 days during growth. July to frost bloom. Zinnia can also use lateral branch cuttings in the summer, but due to the high temperatures and multiple showers, care should be taken to protect the shade.
Zinnia seedlings are very easy to grow in the late growth period. To prevent leggy, one is to appropriately lower the temperature and increase ventilation; the second is to ensure that there is sufficient nutrition area and increase the row spacing; the third is to pick the heart and promote the growth of axillary buds. It usually takes place when the plant height is about 10 cm, leaving 2-4 pairs of true leaf topping. To make the plants low and flowering, spray the dwarfing agent when the shoots grow to about 3 cm. It does not grow in the thick seedlings, but if you want to limit the height, you also need to take care of it. 5 to 7 days prior to planting, the air seedlings were magnified to adapt to the open environment conditions.
Zinnia can adjust the length of the sun to regulate flowering. Because it is a relatively short-day plant, the sunshine is longer than 14 hours, and the flowering is postponed. It takes 70 days for sowing and flowering, and there are more ray flowers; for the sunshine less than 12 hours, the flowering is advanced, and sowing to flowering takes only 60 days. Tubular flowers are more. In addition, the flowering period can also be controlled by adjusting the sowing date and picking time.