How to plant hydrangea seeds?

Hydrangea, also known as Hydrangea, Hydrangea, etc., is a shrub plant of Hydrangea of Saxifragaceae, native to Japan and Sichuan, China. It is widely cultivated in Europe, the Netherlands, Germany and France. The flowers are plump, large and beautiful. Modern parks and scenic spots are planted into pieces to form a landscape. Let's take a look at how to plant hydrangea seeds.

How to plant hydrangea seeds?

The flowers of Hydrangea are mostly sterile and have few mature seeds, so they are usually cultivated by cutting and branching asexual propagation. Hydrangea prefers warm, humid and semi-overcast environment, the suitable temperature for growth 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, but high temperature makes flowers fade quickly. The basin soil should be kept moist, and the sandy loam with loose, fertile and well-drained soil is better.

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.