Why don't hydrangeas bloom?

Do you know why hydrangeas don't blossom? Hydrangea is eight Immortals, also known as Ziyang Flower, Yin Hydrangea, florescence is usually from June to July, Hydrangea stem stout, leaf hypertrophy, leaf color dark green but not flowering, there may be the following four reasons, let's have a look!

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.

Imbalance of fertilization proportion of Hydrangea

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.

Maybe it's because of 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.

The control of lighting time 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.