Flower garden and landscape

Why hydrangea does not bloom


The summer months are hydrangea blooms. This beautiful deciduous shrub is luxuriously fragrant with flowers from June to September. Florists willingly use large inflorescences for wedding decors and bouquets. To admire the beauty of a flowering hydrangea bush in your garden, you should take care of the proper conditions for it. Unfortunately, some hydrangeas do not bloom from year to year, despite the care and efforts of gardeners. Why this happens, we will tell in the article.

Why hydrangea does not bloom

Especially often, beginner gardeners complain about the lack of flowering when growing hydrangeas, the flowers of which are formed on the shoots of the previous year, namely - leaf hydrangea.

1. Freezing of flower buds

Most hydrangeas can winter in open ground without shelter, not only in the south of Russia, but also in the middle lane. But not large-leaf hydrangea. It requires additional shelter for the winter (and some of its varieties require cold wintering in the basement at a temperature not lower than +5 ° C). Take care of minimal warming already in September, because inappropriate frosts can destroy flower buds.

Around the beginning of October, an air shelter for hydrangea should be made using, for example, fallen autumn foliage. Hydrangea for the winter is covered with straw mulch or coniferous branches, covered with paper or agrofiber.

At the beginning of April, they begin to remove the shelter in layers, but if frost is expected, agrofibre must again be thrown on the hydrangea.

Read also our article The best varieties of large-leaved hydrangeas for the middle lane.

2. Incorrect pruning

Different types of decorative hydrangeas require different methods when performing sanitary and shaping pruning. Flowers panicle hydrangea (Hydrangea paniculata) just like tree-like (Hydrangea arborescens), bloom on the shoots that are formed in the current year, and leaf hydrangea (Hydrangea macrophylla) - on the last year's shoots. When pruning, only old or damaged branches are removed and young sprouts with flower buds are not affected.

When cutting flowers of large-leaved hydrangea, you need to trim the stems very modestly so as not to remove many new buds. Take similar care when removing wilted flowers.

In summer, it is recommended to tweeze so that the shrub grows. This procedure should not be performed later than mid-August, as it may interfere with kidney formation.

Pruning for flowering panicle and tree hydrangeas is done in the fall, shortening the shoots to two or three pairs of formed buds, then the bush next year will give many lush flowering shoots.

Remember that hydrangeas require good insolation. Lack of flowering may be the result of excessive thickening of the crown of the bush. Every year, remove old four- and five-year-old branches so that flower buds have access to the light. For hydrangeas blooming on the shoots of the current year, only young branches that need to be preserved are valuable.

When cutting flowers of large-leaved hydrangea, you need to trim the stems very modestly so as not to remove many new buds.

3. Nutrient Deficiency

Lack of colors is often the result of negligence when using fertilizers. Even an insignificant deviation from the correct dosage and non-observance of the feeding time can disrupt the fragile balance of the mineralogical composition of the soil.

Every spring, gardeners abundantly fertilize hydrangea bushes, scattering shredded compost and other organics under them. In spring and summer, with a generous hand, they pour multicomponent mineral fertilizers for flowering plants. At the same time, they do not take into account that the excessive content of some elements complicates the assimilation of others.

Hydrangeas are sensitive to leaf chlorosis caused by too much calcium in the substrate. This prevents the absorption of iron and nitrogen, which is manifested in discoloration of the leaves and poor flowering or its absence. The soil should be acidified with crushed bark, peat or ammonium sulfate, only then all the necessary hydrangea nutrients will be absorbed.

4. Weak greenhouse seedlings

In early spring, container hydrangea seedlings with large, already blossoming clusters of inflorescences are sold at the markets. Do not buy hydrangea flowering shrubs in the spring for planting in the garden. These are plants grown in greenhouses that have undergone a forcing process (flowering at unusual times). They are not hardened and not used to natural conditions.

If, nevertheless, the plant was purchased or received as a gift, it would be better to winter it in a dark cellar, at a temperature of +5 ° ะก.

Do not buy hydrangea flowering shrubs in the spring for planting in the garden

5. The hydrangea bush is affected by the disease

Hydrangeas that are grown on waterlogged soils (near water bodies) or too thickened are often predisposed to fungal diseases. Hydrangeas can be affected by powdery mildew or leaf spot, suffer from gray rot.

As a result of the defeat of the fungal disease, the plant weakens, its growth is inhibited and, as a result, flowering weakens. That is why it is so important to ensure the proper conditions for the cultivation of hydrangeas, as well as to carry out early and correct diagnosis of fungal diseases, and to use appropriate fungicides for treatment.

Preventively, to prevent disease, plants can be sprayed with biostimulants of growth and flowering.

6. The root system is poorly developed

Young hydrangea bushes need time to develop strong roots. Do not lose patience when growing your seedlings, but rather - help the plants in their development, creating the right conditions.

Closer to autumn, it is advisable to use special autumn fertilizers that contribute to the development of the root system, strengthen the roots of the plant, and prepare them for winter.

Read more about hydrangea care in the article Hydrangea: main types, planting and care.

7. Insufficient watering

Timely watering is equally important both before and after flowering, because garden hydrangeas respond poorly to lack of water. But hydrangeas are especially sensitive to a lack of water when they bloom. Intensive watering should be carried out not only in the spring after planting, but also in the summer to prevent drying of these very decorative flowers. A lack of moisture will adversely affect the appearance of both flowers and leaves.

To retain moisture around the bushes, it is recommended to lay out mulch. Too long a hydrangea stay in the heat without proper watering can destroy the plant or, at best, the bush will not bloom for several seasons until it is fully restored.

Tree hydrangea can grow well in the sun, but it will need more frequent watering.

8. Hydrangea is suppressed by neighboring plants

Another reason for insufficient flowering can be the incorrect location of the plant, that is, planting it in the overgrown and shaded part of the garden. If young hydrangea does not grow and does not bloom, thin out the surrounding trees and shrubs to give more hydrangea space.

Sometimes for some reason the place is not suitable for the plant, despite the conditions created. It is enough to transplant a capricious bush into another part of the garden and next year it will show itself in all its glory.

It is believed that hydrangeas are queens of the semi-shady corners of the garden. But some species and varieties also feel great in a place open to the sun. True, they will have to be watered in sunny areas much more often.