Pot culture methods and matters needing attention of hundred-day grass the reason for the growth of hundred-day grass

Zinnia is one of the famous ornamental plants, which is loved by many people after it was introduced into China. At present, it is widely cultivated in all parts of our country. The special flowers are huge and colorful, and many flower friends who like zinnia will raise a pot and watch it as a potted plant. In the process of breeding, there will still be some problems. Today, the editor will introduce to you the correct breeding method of zinnia.

Pot culture methods and matters needing attention of zinnia

First, the culture method of zinnia 1. Watering

Due to the high demand for light, the water is easy to evaporate, so it is necessary to maintain proper humidity and can be watered every day in summer. 2. Fertilization

At the time of planting, 2-3 grams of compound fertilizer was applied to the bottom of the basin, and 800 times of solution was used to irrigate the roots after planting. The basin soil should be kept moist within one week of planting to promote the growth of the surface root system. When the root system grows to the bottom of the basin, topdressing can be started, fertilizing 2-3 times a week (applying water fertilizer in sunny days, the concentration of 200mg is controlled within 2-3 g / basin in rainy days), and calcium fertilizer can be added once. 3. Temperature

Hundred-day grass likes to be warm and sunny, can not bear the heat, high temperature and cold, and the suitable temperature for growth is 18-20 ℃ in daytime and 15-16 ℃ at night. It grows especially fast in summer. 4. Lighting

Can be directly used in full sunlight, direct sunlight. If there is not enough sunshine, the plant is easy to grow, the resistance is also weak, and flowering will also be affected.

2. Points for attention: 1. If the plant is not treated with coring, there are too few lateral branches and few flowers, and proper coring can promote the dwarfing of the plant and the increase of flowers. When the seedlings grow to 4 leaves, plant and pick the heart to promote the growth of lower branches to form a better plant shape. After a week of planting, we began to pick the heart, leaving 4 pairs of true leaves, and depending on the growth and branching of the plant, we decided whether to pick the heart again or not. During flowering, phosphate and potassium fertilizers such as potassium dihydrogen phosphate continue to be added to promote the flower head to grow continuously. After the flowers withered, the withered flower heads should be cut off in time to reduce nutrient loss. 2. Diseases and insect pests control common diseases of zinnia: White star disease, black spot disease, mosaic disease and so on. The seedling growth period of zinnia is very easy to grow. Pay attention to lowering Wendy, picking the heart, and watering less.

The reason why a hundred days of grass grows.

1. Lack of light

Zinnia is a plant with high demand for light, and it can also change the florescence, advance or postpone it with the help of the adjustment of light. Seedling growth rate is very fast in the later stage, lack of light, and it is very easy to grow in vain.

2. Too much water

In places with strong light, water evaporates faster, but if the light is not enough, it will lead to slow evaporation of water in the basin soil, and if a large amount of water continues to be watered, it will affect the respiration of the roots. resulting in poor plant growth.

3. Excessive nitrogen fertilizer in sowing substrate

In the sowing medium of zinnia, a small amount of fertilizer can be applied, both phosphorus and potassium fertilizer and nitrogen fertilizer, but if the nitrogen fertilizer is excessive, it will cause the seedling to grow faster than the normal level in the later stage, thus growing in vain.

How to prevent the hundred-day grass from growing

1. Increase the light

Hundred-day grass seedlings need enough light to grow happily, and when the sun comes out in the early morning, they can be placed in a place where they can be exposed to light until the sun sets. The seedlings can be moved indoors when the outdoor temperature is low at night. Potted seedlings have this advantage, where you like to move!

2. Balanced nutrients

A hundred-day grass seed needs enough nutrients to grow into a robust plant. But nutrients must be balanced, otherwise it is easy to overgrow or cause other poor growth conditions. When applying fertilizer, the amount of phosphorus and potassium fertilizer can be increased, the proportion of nitrogen fertilizer can be reduced, and the balanced proportion of nutrients can be realized.

3. Coring treatment

When the seedling grows to about 10 cm, coring treatment is carried out to promote the growth of axillary buds, leaving 2-4 pairs of true leaves. Coring can not only prevent the overgrowth of seedlings, but also limit the height of zinnia, dwarf, make the plant more beautiful, and make the flowers bigger and more colorful.

The Propagation method of Zinnia

1. Sowing seeds

The seeds can be sowed or unsown, covered with thin soil, watered after sowing, germinated after sowing for 5-10 days, and transplanted once when the seedlings grow 2 leaves and 5-8 cm high. The seed life of zinnia is 3 years, and the germination rate is about 60%. Try to choose the full seeds of the previous year to improve the seed germination rate. The sowing date can be determined according to the flowering time, and it takes about 75-90 days from sowing to flowering.

2. Cuttage

Cuttage seedlings are not as neat as sowing seedlings, you can choose to grow 10 cm side buds for cutting, generally 5-7 days to take root, and later cultivation management is the same as sowing, 30-45 days later can be out of the nursery.

Cutting can be combined with coring and dwarfing.

Zinnia is not very demanding on the environment, but flower friends still have to master its growth habits, and it is absolutely right to breed them according to their growth habits. In addition, we need to pay attention to picking its heart in time, so as not to affect its beauty.