Why lilacs do not bloom – find out the causes of the problem
Bright and fragrant lilac is one of the main spring decorations of the infield. There are a number of reasons why lilacs do not bloom, because the lack of flowering is a problem that many gardeners face. Elimination of these factors allows you to restore the vegetative properties of the plant and get a lush and long-lasting flowering of lilacs..
What time of year does lilac bloom?
At what time lilacs bloom depends on its variety, as well as the climatic conditions of a particular region. There are more than 300 varieties of lilacs, each of which differs in terms of budding and flowering duration..
Most of the popular varieties of lilacs bloom in the first half of May. These include Persian, Ordinary, Hungarian. Species such as Chinese lilac only bloom towards the end of May or early June. To enjoy the fragrant fragrance in summer, you can plant the Amur variety of lilacs, which blooms later than the rest – in mid or late July.
What year the lilac blooms for depends on many factors. Young bushes from grafted seedlings can be covered with inflorescences the next year after planting, but it is best to remove them – this will help the plant maintain vitality. Bushes grown from cuttings, cuttings or seeds bloom only 4-6 years after planting.
Lilac does not bloom – the main reasons
Most often, lilacs do not bloom due to mistakes made during planting, as well as mistakes when growing a shrub. Novice gardeners do not know how much fertilizing and watering a plant needs, which leads to a lack of flowering.
Why lilacs don’t bloom – common reasons:
- unsuitable soil composition;
- wrong landing site;
- insufficient lighting;
- incorrect pruning;
- disease and insect pests.
The reason for the lack of flowering of lilacs can be a lack or excessive amount of fertilizers, especially nitrogen-containing dressings..
Unsuitable soil composition
Despite the fact that lilac is considered an unpretentious crop, it has several requirements for the composition of the soil. For growing shrubs, it is best to use areas with light, sandy loam or peat soil..
Basic requirements for soil:
- average humidity level;
- neutral acidity of the soil;
- the location of groundwater is not higher than 1.4-1.7 m to the surface of the earth.
It is especially dangerous to plant lilacs in areas with heavy, swampy and acidic soil..
In this case, you can use ash, lime or dolomite flour to deoxidize it. But most often the effect obtained is not enough for planting lilac bushes..
Wrong location and lack of lighting
One of the most common reasons that lilacs do not bloom is the wrong place to grow it, too windy or shaded..
In order to ensure active growth and long-term flowering of the shrub, you need to take into account the basic rules for choosing a site:
- for planting lilacs, it is advisable to choose areas of the garden from the east or west side, which are well lit by the sun for most of the day;
- the place for lilacs should be protected from wind and drafts;
- it is best to choose places on plains or gentle slopes for landing holes.
If, after 1-2 years after planting, the lilac bushes have not begun to bloom, most often the reason lies in insufficient lighting.
Lilac belongs to light-loving crops, therefore, when planting under a house or in the shade of tall trees, there is a risk that the flowering period will not begin..
Errors when planting lilacs
If serious mistakes were made during the planting of lilacs, this negatively affects the development of the plant, slows down the appearance of flower buds and leads to a weakening of the root system of the shrub.
What to do to make the lilac bloom during planting:
- The most important condition for the development and flowering of a shrub is good drainage. Prepare planting holes up to 50 cm deep, fill the bottom of each with a layer of drainage material – this can be small pebbles, rubble or broken brick.
- Pour a composition of 350 g of ash, 35 g of superphosphate and 25 kg of humus on top of the drain.
- Pay particular attention to the grafting site of the young seedling. It cannot be covered with soil, it should be located about 5 cm above the ground level.
- After that, water the young bush generously at the root..
- When the water is completely absorbed, mulch the area of the trunk circle. The mulch layer should be at least 4-6 cm.
The optimal time for planting lilac bushes is spring, when the buds have not yet blossomed, or the summer months, after flowering is complete. It is advisable to start planting work in cloudy weather or in the evening, after sunset..
Excess or lack of feeding
Deficiency of nutrients and their excess negatively affect the flowering of lilacs. If the bushes begin to fatten, that is, release new shoots, but do not form flowers, this indicates an excessive amount of nitrogen-containing fertilizers..
When growing lilacs, it is very important to observe the fertilization rates. It is advisable to apply fertilizing with nitrogen content only 2-3 years after planting the shrub. To do this, in April or May, 60-70 g of urea or 70-80 g of ammonium nitrate is introduced under each bush..
In the event of signs of an excess of nitrogen, such dressings should be carried out less often, no more than 1 time in 2 years..
An important role in stimulating the flowering of lilacs is played by its correct pruning. This procedure cannot be carried out in the autumn months, since pruning excess shoots will lead to delayed bud formation and next year the lilac bush may simply not bloom..
How to make lilac bloom – it is best to prune the shrub in early spring, before the buds swell. Remove any loose and dry shoots. Excess growth can be removed throughout the year by cutting off the shoots with a shovel at ground level.
Once every 3-4 years, lilac bushes require rejuvenation. To do this, cut out all the shoots that grow inside the lilac or thicken its crown, as well as old branches. To prevent infection from getting inside the wound surfaces, they need to be lubricated with oil paints or garden varnish.
Immediately after the end of flowering, you need to cut off all the drying out inflorescences. If left, it will ripen the seeds and noticeably weaken the shrub..
Disease and insect damage
Lilac bush, affected by diseases or pests, will not please with lush and long flowering.
Common problems when growing lilacs:
- Fungal lesions. They can be identified by the appearance of spots of various shapes and sizes on the leaves of the shrub, the fall of foliage and inflorescences. To prevent further spread of the fungus, cut and burn all affected leaves and branches. And treat the lilacs with copper preparations.
- Late blight – signs are brown spots on the bark of lilacs, as well as the lack of bud opening and flowering. Remove and burn the affected areas of the bush, spray the bush with Bordeaux liquid.
- Nematodes – when lilacs are damaged by nematodes, the root system dies off, shoots, leaves and inflorescences begin to dry out and fall off. The fight against nematodes is carried out using special chemicals.
In order for lilac bushes to please with lush and long flowering, you need to provide the plant with good care, as well as eliminate all mistakes that negatively affect the inflorescences. This will help turn lilacs into a vibrant and colorful garden decoration..