Why won't your hydrangea bloom? An analysis of the latest causes

Do you know why hydrangeas don't bloom? The hydrangea, also known as the eight-immortals flower, and also called purple sun flower or shade hydrangea, usually blooms from June to July. If the hydrangea has thick stems, large leaves and deep green foliage but does not bloom, there may be the following four reasons. Let's take a look together!

Potted hydrangeas have not been pruned

Usually, after the flowers fade, the branch tips need to be cut short promptly to encourage new branch growth. When the new branches grow to 8-10 cm, they can be cut back again, which encourages the lateral buds on them to develop and fill out early, and only in this way can flower-bearing branches grow the following year. In other words, topping the plant suppresses vegetative growth and encourages it to produce more lateral branches and form flower buds.

The fertilizer ratio for hydrangeas is unbalanced

There may be too much nitrogen fertilizer and too little phosphorus and potassium fertilizer, causing excessive vegetative growth, which is unfavorable for flower bud formation, so the plant cannot bloom normally in the second and third years.

It may be because of too much watering

After the plant's new shoots grow to a certain length, watering should be appropriately withheld to suppress vegetative growth and promote flower bud differentiation.

The light duration control is unsuitable

The hydrangea is a short-day plant. It needs to remain in darkness for more than 10 hours per day, and it takes about 6 weeks to form flower buds. For forcing cultivation, the plant needs to go through a cool period of 6-8 weeks (5-7°C), then be placed at 20°C to force flowering. When the inflorescence becomes visible, lower the temperature to about 16°C, and after maintaining this for about 2 weeks, it will bloom.