The latest culture methods and matters needing attention of Hydrangea

Hydrangea is a common potted ornamental flower and tree, also known as eight immortal flowers, powder ball, grass hydrangea, etc., for Saxifragaceae Hydrangea shrub plant, the flower shape is plump, large and beautiful, the flower color can be red and blue, pleasing to the eye and spirit, and the ornamental value is extremely high. Modern parks and scenic spots are planted into pieces to form a landscape. Let's take a look at the breeding methods and matters needing attention of hydrangea.

Growth habits of Hydrangea

1. Soil: Hydrangea is suitable to grow in fertile and well-drained acid soil. Soil pH has a very obvious effect on the flower color of hydrangea. The flowers are blue when the soil is acidic and red when the soil is alkaline.

2, humidity: hydrangea pot soil should be kept moist, but watering should not be too much, especially in the rainy season to pay attention to drainage to prevent rotting roots caused by waterlogging. It is better for indoor potted plants to be slightly dry in winter, and the leaves are easy to rot if they are too dry and humid.

3. Temperature: the suitable temperature for the growth of hydrangea is 18: 28 ℃, winter temperature is not lower than 5 ℃, flower bud differentiation needs 5: 7 ℃ for 6-8 weeks, 20 ℃ temperature can promote flowering, 16 ℃ after anthesis can prolong flowering period, pay attention to high temperature make flowers fade quickly.

4. Lighting: Hydrangea is a short-day plant, usually cultivated to avoid the hot sun, 60-70% shading is the most ideal, when the light is too strong in midsummer, the appropriate shading can prolong the flowering period.

Propagation method of Hydrangea

1. Ramet: Hydrangea should be carried out before sprouting in early spring, the rooted branches should be separated from the mother plant, pot directly, watering should not be too much, and should be maintained in semi-shade, and then transferred to normal maintenance after the germination of new buds.

2. Striping: Hydrangea striping propagation is carried out during bud germination, can grow after 30 days, cut off from the mother plant in the following spring, transplant with soil, and blossom in the same year.

3. Cutting: Hydrangea cuttings are carried out in the rainy season, cutting the top twigs, about 20 cm long, picking off the lower leaves, cutting at the appropriate temperature of 13-18 ℃, rooting 15 days after cutting.

Culture method of Hydrangea

1. Soil: loose, fertile and well-drained sandy loam is better for hydrangea, but the color of hydrangea changes greatly due to the change of soil pH. Aluminum sulfate can be applied during bud formation in order to deepen blue, and lime can be applied in soil to keep pink.

2. Watering: the potted soil of hydrangea should be kept moist, but it should not be watered too much, especially in the rainy season to prevent rotting roots caused by waterlogging. It is better to dry indoor potted plants in winter. If it is too wet, the leaves will rot easily.

3. Lighting: Hydrangea is a short-day plant, usually cultivated to avoid the hot sun, 60% to 70% shade is the best. When the light is too strong in midsummer, proper shading can prolong the flowering period.

4. Temperature: the optimum temperature for the growth of hydrangea is 18-28 ℃, and the winter temperature is not lower than 5 ℃. Flower bud differentiation takes 6-8 weeks under the condition of 5-7 ℃. The temperature of 20 ℃ can promote flowering, maintain 16 ℃ after anthesis, prolong the viewing period, and pay attention to the rapid discoloration of flowers caused by high temperature.

5. Fertilization: hydrangea should generally apply thin pancake fertilizer and water every 15 days or so. In order to keep the basin soil acidic, 0.2% ferrous sulfate should be added to turn it into alum fertilizer when applying liquid fertilizer, and 0.5% superphosphate soaking solution should be applied twice during the bud period.

6. Pruning: after Hydrangea blossoms, attention should be paid to the removal of flower stems to promote the production of new branches. Proper pruning can keep the plant shape graceful. In early spring and March, the diseased and weak branches should be cut off from the base, leaving 3-5 strong main branches and truncated, each with 2-3 buds.

7. Insect pests: Hydrangea is mainly caused by wilt, powdery mildew and leaf spot, which can be controlled by spraying 65% Dessen zinc wettable powder 600 times. Insect pests are harmful to aphids and bug bugs and can be sprayed with 1500 times of omethoate EC.

8. Change the basin: hydrangeas generally turn the basin and change the soil once a year, combined with changing the basin to cut off the rotten roots, rotten roots and overlong roots. After the plant is moved into the new pot, the soil should be compacted, then watered thoroughly, placed in a shaded place for about 10 days, and then moved outside for normal management.

Matters needing attention in Hydrangea

1. Hydrangea can be cultivated in tile pots, porcelain pots or plastic pots. It is appropriate to use 15-20 cm pots. During cultivation, the soil can be loaded into flowerpots, slightly compacted, and then irrigated with water. The planting depth should be that the soil carried by the seedlings is suddenly flat with the pots. Do not plant too deep or too shallow.

2. Hydrangea began to pick the heart after 2 or 3 weeks on the pot. Each branch needed 2 nodes for the first time, and the lateral buds grew strong before the second time. The last pick should not be later than the end of June to ensure that the branches can fully grow and differentiate into flower buds.

3. Hydrangea should be placed in the semi-shade or under the curtain in summer and autumn to prevent the scorching sun and prevent the leaves from yellowing and anxiety. Apply topdressing once or twice before and after flowering, and pedicel should be repaired in time after flower fade, so as to maintain a beautiful posture. The basin soil is always moist, but it is necessary to prevent the accumulation of water after the rain.

4. Hydrangea entered the room in the first and middle of October, controlled watering, kept room temperature at about 5 ℃, and promoted its dormancy. Remove the leaves before entering the room to avoid rotten leaves. It began to move to the sunny place in the middle of December, keeping the temperature at 15: 20 ℃, promoting the growth of branches and leaves, and leaving the chamber in late April of the following year.