Why don't potted hydrangea blossom?

Hydrangea, also known as Yin Hydrangea and Ziyang Flower, is a semi-evergreen or deciduous shrub with large opposite leaves, glossy leaves, colorful hydrangea flowers and changeable colors, which can change with the acidity and basicity of the soil. it is as white as snow at the beginning and gradually turns to light blue and light red in the later stage. each inflorescence can blossom for 2 months, which is suitable for both courtyard cultivation and family potted plants. However, it is often difficult to blossom if it is not properly maintained at home, the main reasons are as follows:

(1) excessive nitrogen fertilizer: Hydrangea grows vigorously and has a great demand for fertilizer. During the period from post-anthesis to flower bud differentiation, nitrogen fertilizer is the main fertilizer, and phosphorus and potassium fertilizer is the main fertilizer in the flower bud differentiation stage. If excessive nitrogen fertilizer is applied during the short-day flower bud differentiation period in autumn and winter, the vegetative growth is exuberant, reproductive growth is inhibited, and flower buds cannot be formed, so it is difficult to bloom in the early summer of the following year.

(2) the light is too weak: due to the limitation of conditions and too little light in family cultivation, it is easy to cause branches and leaves to grow and grow poorly. When the flower bud differentiates, the nutrition is insufficient, so that the flower bud can not differentiate normally.

(3) the sunshine time is too long: Hydrangea is a short-day flower, and the sunshine hours should not be more than 10 hours during flower bud differentiation. If family cultivation is kept indoors, long hours of indoor light at night will affect flower bud differentiation.

(4) the room temperature is too high in winter: Hydrangea flower bud differentiation needs a lower temperature, and the temperature should be controlled at 5: 10 ℃ for about one and a half months. If the family cultivation is kept in a warm indoor in winter, the flower bud can not differentiate normally.

(5) unsuitable pruning period: the normal flowering period of hydrangea is from June to July. Generally, the flower branches should be cut off after the flowering period, or they can be re-pruned. If the branches are re-cut in early spring, it is difficult to form effective flower branches from June to August, resulting in reduced flowering or no flowering.

Why doesn't hydrangea bloom? what if hydrangea doesn't blossom?

Hydrangea is eight Immortals, also known as Ziyang Flower, Yin Hydrangea, flowering period is usually from June to July, Hydrangea stem stout, leaves hypertrophy, leaf color thick green, but many hydrangeas do not bloom, then why does Hydrangea not bloom? What if hydrangea doesn't blossom?

Potted hydrangea has not been pruned:

It is usually necessary to cut the tip of the branch in time after the flower fade to promote the division of new branches. when the new branch grows to 8-10 cm, it can be cut short again, which can promote the lateral bud on it to develop and enrich as soon as possible, so that it can grow flower branches in the following year; that is to say, through topping to inhibit the vegetative growth of the plant, to promote its multiple lateral branches, pregnant flower buds.

The proportion of fertilizer application of hydrangea is out of proportion:

It is possible that there is too much nitrogen fertilizer and less phosphorus and potassium fertilizer, resulting in its vegetative growth is too prosperous, so it is not conducive to flower bud gestation, so that the plant can not bloom normally in the second and third year.

It may be due to too much watering:

When the new shoot of the plant grows to a certain length, it is necessary to give appropriate "buckle water" to inhibit its vegetative growth and promote flower bud differentiation.

Lighting time control is not appropriate:

Hydrangea is a short-day plant that remains dark for more than 10 hours a day and takes about 6 weeks to form flower buds. After 6-8 weeks of cool (5-7 ℃), the plant was placed at a temperature of 20 ℃ to promote flowering. When the inflorescence could be seen, the temperature was reduced to about 16 ℃, so that it could blossom for about 2 weeks.

When does hydrangea blossom? why doesn't hydrangea blossom?

Hydrangea is a famous ornamental plant in the Yangtze River valley, also known as eight immortals, powder ball, grass hydrangea and so on. The flowers are beautiful in color, plump, large and beautiful, and the flowers can be red and blue. When will hydrangea blossom? Why don't hydrangeas bloom?

When does hydrangea blossom:

Hydrangea usually blossoms from June to August, and the time from flowering to flower shedding is about 25 days. The color of hydrangea is pink, light blue or white, but the color of hydrangea varies with the pH of the soil or medium. Aluminum sulfate can be applied during bud formation in order to deepen blue, and lime can be applied in the soil to keep pink.

Why doesn't hydrangea blossom:

1. Excessive nitrogen fertilizer: nitrogen fertilizer is the main fertilizer in the early stage of Hydrangea flower bud differentiation, and phosphorus fertilizer is the main fertilizer in the differentiation stage, but excessive application of nitrogen and phosphorus fertilizer in autumn and winter will cause plant excess nutrition, growth inhibition, flower bud differentiation and affect flowering in the second year.

2. Weak light: the family cultivation of Hydrangea is limited by conditions and receives less light, which will cause the leaves to grow excessively and grow poorly. The nutrient consumption of leaves is too large, and the nutrition is insufficient during flower bud differentiation, which affects flowering.

3, the light is too long: Hydrangea is a short-day plant, the light time during the flower bud differentiation period can not be more than 10 hours, the eight immortal flowers placed in the room, the light exposure for a long time at night will increase the light and affect the flower bud differentiation.

4. Pruning is uncomfortable: the flowering period of Hydrangea is from June to August, and the flower branches should be pruned after flowering to reduce the loss of nutrients. If the plant is too prosperous and cut again in early spring, it is difficult to form flower branches from June to August, resulting in a decrease in flowering or no flowering.

How to cultivate 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.