How to fertilize spirea in summer and autumn
Spirea is an ornamental shrub of the Pink family, often used in landscape design. For lush flowering, plant nutrition is important, especially on scarce soils, as well as watering, pruning and other care procedures.
Features of Spirea Care
Most types of culture annually give an increase in branches of an average of 20 cm per year. A good growth rate is observed provided that there is sufficient moisture, nutrients and soil cleanliness, which ensures the health of the root system.
Did you know? The name spirea in Latin means "bend", and in Greek - "spiral". And, indeed, in all species the branches are beautifully curved, in some varieties - spiral-shaped.
In order for the bush to have an attractive shape, pruning is carried out annually:
- formative - supports the appearance of the crown;
- sanitary - carried out with the aim of removing diseased and broken branches;
- anti-aging - is carried out every 7-10 years to update skeletal shoots and increase life expectancy.
Young bushes planted this year need frequent watering, especially in dry periods. 10-15 l of water is enough for one bush, depending on its height. Adult bushes are watered only in drought, plants have enough natural rainfall.
It is advisable to water it in the evening so that the moisture does not evaporate too quickly. After watering, after a couple of hours, you need to carefully loosen the earth, providing the roots with oxygen access. The depth of cultivation is not more than 15 cm, since the root system of the spirea is superficial, it can be accidentally damaged. At the same time, weeds are removed that pull nutrients onto themselves.The next morning after the irrigation procedure, the trunk circle is covered with a layer of mulch 10-12 cm.
Any natural material:
- mowed grass;
The mulch will retain moisture, inhibit the growth of weeds and protect the root shoots from overheating on hot summer days.
Spirea responds equally well to organic and mineral fertilizers. However, you need to familiarize yourself with the rules of making those and others, so as not to burn the roots and not harm the culture.
In the spring
Spirea has more than 90 species and varieties, some begin to bloom in the spring, others in the summer. Plants blooming in the spring months cannot be pruned before flowering: the procedure can weaken the bush and prevent flower buds from engaging. In early spring (beginning or end of April, depending on the region), such crops need only minimal cleaning from frozen and weak shoots. After the procedure, stimulating top dressing is carried out, preferably with organic matter, such as mullein. Plants that bloom in summer are pruned carefully in early spring.
Important! It is desirable to combine top dressing with watering - nutrients are better absorbed into the soil.
Prepare fertilizer like this:
- 5: 1 cow manure and water are mixed in containers with a large volume.
- The mixture is covered and insisted for 2 weeks, stirring once every 3 days.
- Then a liter of infusion is diluted with water to 10 liters of volume, add 10 g of superphosphate.
- Under a plant up to 1 m high, 8–10 l of mullein is enough; for a high one, 10–15 l of infusion under a bush is needed.
- Remove weak and frozen shoots.
- Branches growing inside the crown and competing with skeletal branches are cut into a ring.
- The ends of the shoots are shortened, protruding from the shape of the crown.
After the procedure, the spirea should restore strength, and for this it needs to be fed. Use compounds with nitrogen, which will stimulate the development of the kidneys and support the roots.
You can use the mullein described above or take mineral fertilizers:
- ammonium nitrate - 15 g;
- potassium sulfate - 15 g;
- superphosphate - 30 g.
Did you know? Spirea is used in folk medicine, since it contains aspirin, tannins and flavonoids.
In June, pruning of shrubs that managed to bloom in the spring is carried out. After this, the plants need to be fertilized: 25-30 g of nitrophoska per 10 liters of water, under the bush. In late May, early June, a stimulating flowering is carried out for feeding spirea shrubs flowering in July – August. Wood ash 100–150 g for low-growing varieties, 250–400 g for tall species, superphosphate 20 g.
At the end of summer, it is useful to once again add wood ash under the bush: in addition to potassium, it also contains many useful trace elements that strengthen the root system, nourish tissues and support the defenses of the culture.
Starting in September, the gardener prepares the plant for wintering. Flowering spirea takes a lot of energy, so before winter you need to restore the supply of nutrients. Up to the first frosts every 2-3 weeks, fertilizing with potassium and phosphorus is carried out.
Important! In the fall, nitrogen cannot be added: the substance stimulates the growth and laying of buds, which in the wintertime can be detrimental to the plant.
Spirea is an unpretentious plant, but it still needs a minimum of care. From the optimal balance of nutrients and moisture depends on the splendor of flowering crops, growth rates and life expectancy.