Step by step hundred-day chrysanthemum
Hundred-day chrysanthemum, also known as hundred-day grass, annual herb. Native to Mexico, it is a famous ornamental plant with single, double, rolled leaves, wrinkled leaves and horticultural varieties of different colors. It is widely cultivated in all parts of China.
Morphological characteristics
Stem erect, 30-100 cm tall, hispid or hirsute. Leaves broadly ovoid or oblong-elliptic, 5-10 cm long and 2.5-5 cm wide, base slightly cordate-clasping, both surfaces scabrous, densely hispid below, base triveined.
Growth habit
Hundred-day chrysanthemum likes warmth, cold tolerance, sunshine, fear of heat, strong sex, drought tolerance, barren resistance, and avoid continuous cropping. The root is deep and the stem is hard and not easy to lodge. It is suitable to grow in fertile and deep soil. The suitable temperature during the growing period was 15-30 ℃.
Water and fertilizer conservation
In addition to the seedling stage, it needs timely watering, in addition, it is generally not suitable for more watering. But the summer period needs to be watered frequently to keep the soil moist. Otherwise, it will cause small leaves and yellow flowers, poor color and luster, and the ornamental value will be greatly reduced. During the whole growth and development period, it is usually enough to chase three times of thin fertilizer. The mixed fertilizer of chlorine and potassium was mainly used in the seedling stage, the phosphorus fertilizer was the main fertilizer in the bud stage, and the compound fertilizer of chlorine, phosphorus and potassium was applied in the first ten days of September. If you fertilize too much, the plant is easy to overgrow and cause lodging.
In the high temperature season, the growth of zinnia becomes weaker, flowering is poor, and it does not bear seeds. At this time should be often watered, while the need for timely control of red spiders, autumn can continue to grow and blossom.
After each flower fade, the residual flowers need to be cut off in time to reduce the consumption of nutrients and facilitate flowering again. At the same time, fertilizers mainly based on phosphorus and potash should be applied for 1 or 2 times. Do not plant continuously in the same piece of land to reduce the occurrence of diseases.
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