Why does hydrangea only grow leaves but not bloom?

Hydrangea gets its name because its flowers resemble a hydrangea ball, and it is much favored by people for its attractive flower shape and rich colors. But some friends find during cultivation that the hydrangea they grow only grows leaves and does not bloom. What causes this? Let's take a look together.

1. Improper pruning

The flowering period of hydrangea is generally from April to June. New seedlings generally do not bloom in the same year, and only bloom in the second year. Generally speaking, hydrangea usually blooms on old branches. But if the old branches are not pruned in time, it will affect flowering the following year. However, be careful not to prune all the old branches, otherwise it will be extremely difficult to bloom the next year. After hydrangea blooms, pruning should also be done, keeping 3-4 buds on each branch and cutting off all the rest. The best time is generally August to September, otherwise it will affect flowering the following year.

2. Light reasons

Hydrangea is a short-day flowering plant. If the light period is too long during flower bud differentiation, it will affect flower bud differentiation, which will result in very few flowers. However, insufficient light can also cause no flowering. Hydrangea is shade-tolerant, but if it cannot be exposed to sunlight for a long time, it will grow poorly, which will affect photosynthesis and reduce the possibility of flowering. Therefore, during cultivation, give it sufficient light so that it can produce more beautiful flowers.

3. Fertilizer and water reasons

Plant flowering cannot be separated from fertilizer and water. Especially in spring, apply phosphorus and potassium fertilizer in advance to promote flower bud differentiation so that it can bloom. But note that before flowering, nitrogen fertilizer must not be applied too much, otherwise it will affect flowering. Improper watering is also one of the reasons why hydrangea does not bloom. During watering, if too much water is given, it will cause the potting soil to dry out, making it unable to absorb effective moisture and resulting in no flowering. Too much watering will cause waterlogging, leading to root rot in the potting soil, and it will not bloom either. When cultivating hydrangea, watering and fertilizing should be determined according to the plant's growth and the season.

4. Temperature reasons

Generally, the most suitable temperature for hydrangea is 18-25 degrees. If it is under high temperature in summer, it will affect growth and cause no flowering. But when the winter temperature is too low, it will cause freezing damage to the plant, making flower bud differentiation impossible, and no flowering will occur. During summer care, once the temperature exceeds 30 degrees, shading treatment and spraying water mist are needed to lower the temperature and humidity in time. In winter, it is recommended to place it in a greenhouse for care and keep the temperature above 10.

The above is an introduction to the reasons why hydrangea only grows leaves but does not bloom. I hope it can help you. If you want to learn more related knowledge, please follow us.