Japanese Spirea: hedge varieties
Japanese Spirea - very beloved and popular among landscape designers. This is explained by its decorative effect, prolonged flowering, versatility of application and unpretentiousness in care. This culture is used for different purposes, most often for creating living fences.
Varieties of Spirea Suitable for Hedgerow
Japanese Spirea (Latin: Spirea japonica) is well suited for single planting and growing in groups. It is used in rock gardens, discounts, rocky gardens, as a groundcover. Quite often, planting several varieties of this species, make elegant undersized hedges.
The most suitable varietal specimens for this purpose are:
- gray spirea;
Varieties such as Bumalda, Densiflora, Little Princess, etc. can also be used. To imagine how these plants will look on the site, you should get to know them better.
Did you know? In 1839, the chemical composition of spirea was studied in detail. As a result, acetylsalicylic acid or aspirin was obtained from its branches.
The plant reaches a maximum growth of 1.8 m. It grows at an average rate. The shoots of adult plants are bent down. Leaves are lanceolate, gray-green. The bottom plate is lighter than the top.
During flowering, inflorescences in the form of shields containing small white flowers are formed along the entire length of the shoots. Flowering occurs in mid-May, lasts a month.
The decorative forms of gray spirea are called Grefshame (bush height - up to 1 m) and Graziosa (0.8–1.2 m).
The first shrub is popularly known as the “Bride”. The described hedgehog variety goes well with oak-leaved spirea blooming with cream flowers, as well as varieties that produce inflorescences in July - loosestrife, Billard.
Shrub grows to 2 m. It has arched shoots, bent downward, obovate leaves, with teeth along the edges. The upper leaf plate is painted dark green, the bottom is lighter, bluish. In autumn, foliage is painted in orange and red shades.
Flowering occurs in mid-June. It lasts 1–1.5 months.
Sometimes the bush can throw out inflorescences repeatedly - in July - August. They have a hemispherical shape. They are placed along the entire length of the branches. The flowers are white. This variety of spirea landscape designers quite often combine with lilacs and conifers.
Breeders brought 3 decorative forms of this hybrid:
Plants belonging to this variety grow 1.5–2 m high. They have ribbed, bare, upright shoots. Leaves elongated-lanceolate, with sharp ends. The top sheet plate is painted dark green, the bottom is lighter in color.
Flowering occurs in June - August. At this time, the bush produces inflorescences in the form of cylindrical panicles, in which pink flowers are collected. The variety is recommended for cultivation in areas with a cold climate.
The shrub has a height of 1.5–2 m. It forms a dense, rounded, dense crown, reaching a diameter of 2 m. Ribbed shoots, under the weight of inflorescences tend to the ground. Leaves are ovate, with sharp ends and large teeth along the edges. Shield inflorescences appear in May. They are in the form of hemispheres. White in color. Flowering lasts about a month.
Spirea Arguta or sharply serrated grows up to 2 m. It differs in early flowering - inflorescences in the form of umbrellas form in late April - early May. The flowers are white in color. They are small, reaching a diameter of 0.8 cm. This variety has a sprawling, lush crown.The leaves are narrow, lanceolate, strongly serrated. Painted in dark green.
Important! When selecting a variety, the climatic features of the region should be taken into account. In areas with severe winters, it is necessary to plant frost-resistant plants, in areas with hot summers - drought-resistant specimens.
Since the inflorescences of Argut's spiraea are formed on last year's shoots, after they bloom, the bush must be pruned. Accordingly, in order for the hedge to look decorative throughout the season, next to this variety it is necessary to plant plants whose flowering period falls on the period starting in July.
How to plant a hedge from spirai
Spiraea planting should be planned for early autumn. It is better to purchase seedlings in containers. So you can be sure that they quickly adapt to the open ground and move to growth.
This decorative culture can put up with almost any soil, except for too heavy and swampy. It exhibits the highest decorativeness when planting in moist, well-drained, fertile soils. The soil should be fertilized with peat and turf.
Important! It is necessary to plant Japanese spirea in such a way that the root neck of the seedling is 2-3 cm above the surface of the earth.
The technology for planting the hedge is as follows:
- Make markings, noting the places where the live fence will begin and end with stakes, and then pulling between them along the length and width of the rope.
- Dig out planting pits 40-50 cm deep, keeping intervals of 50-60 cm.
- Put drainage 10 cm high at the bottom.
- Pour fertilized soil onto it.
- Establish the root system of the shrub (when planting out of the container, transplant by transshipment without destroying the earth coma)
- Fill the pit with soil to the top.
- Seal up.
- Irrigate using a bucket of water for each plant.
- Mulch the near-trunk zone and the aisles with fallen leaves or wood sawdust.
Japanese Spirea needs minimal care. In the first year after planting, it must often be watered. In the future, the frequency and volume will depend on weather conditions. In dry periods, they need to be carried out more often and more abundantly. In rainy - less often, as the upper layer dries.
After each irrigation and rain, you need to loosen the soil in the near-trunk zone. This will prevent the formation of a dense crust on the soil surface. This procedure also helps to improve the permeability of water and oxygen to the roots.
To water the plants less often, you should mulch the soil in the near-trunk zone with a layer of peat, humus, straw 7 cm high.
An important measure for the care of spirea is fertilizing fertilizers. Mineral mixtures are needed for this crop. At the beginning of the growing season, nitrogen is needed. It will give a green mass gain. During the formation of buds, phosphorus and potassium compounds should be added.
Trimming is very important for spirea.. The plant tolerates this procedure well. Recovery is quick and easy. Pruning is carried out every year - in spring and autumn. During this event, all frozen, dried, sick, damaged, old, weak branches are cut out, as well as last year's growth is cut to kidneys with good development.
Adult shrubs that are 4–5 years old are pruned more radically. Only 30-40 cm are left from the surface of the earth.
Young plants can freeze in winter, so they should be covered. After the first frost, in late October - early November, the trunks are wrapped in burlap or breathable non-woven material. Warming of the root system is carried out by mulching the trunk zone. It is covered with a high layer of dry compost or geotextiles.
Did you know? Spirea have thin but very strong rods. Having learned about this feature of the plant, in Russia it was used for the manufacture of whips and ramrods.
Pests and diseases
The described plant has strong immunity, therefore it is very rarely ill and only as a result of mistakes made during planting and care.
Japanese spirea is most often affected by verticillus wilting. The main symptoms of infection are yellowing and drying out of the leaves. These processes begin from the lower tier. The disease is difficult to treat. You can save the bush only at an early stage of infection. It should be sprayed with any copper-containing preparation, for example, Bordeaux liquid or copper sulfate.
Of the harmful insects, the greatest danger to the decorative culture is:
- Rose leaflet. This pest damages buds, leaves, buds. A clear sign of its presence on the plant is twisting of foliage. For prevention, insecticides should be sprayed in early spring, for example, "Koragenom". Nearby you need to plant such smelling cultures as calendula, yarrow, marigolds. Their strong smell will scare away most parasites. If the leafwort plant still struck, it is necessary to remove and burn the damaged shoots as soon as possible, as well as treat the branches, trunk and trunk area with one of the following drugs: Cesar, "Lepidocide", "Koragenom", Confidor Maxi. From folk remedies, a decoction of bitter wormwood, infusions of tobacco, tomato and potato tops help drive the leaflet out of the site.
- Mining fly or leaf miner. You can find out that this pest settled in the flowerbed by the punctures and moves made in the leaves. Treatment consists in tearing off the affected leaves, spraying with drugs with pyrethrum in the composition.
- Green rose aphid. When this sucking parasite settles on a shrub, yellowing and drying out of the foliage, deformation of shoots, a delay in development and growth, falling of buds, weakening of the plant occur. For treatment, soap solution, tobacco, pepper, garlic decoctions, insecticides are used Actellik, Aktara, "Fufanon".
- Spider mite. The harmful activity of this sucking pest leads to the fact that the leaves turn yellow and dry out, the plant lags in growth and development. A characteristic sign of damage by a spider mite is the appearance of a web on the ground organs of the plant. Get rid of the parasite by spraying with acaricides, for example, Apollo, "Actofit", Envidorinsecticides “Fitoverm”, Akarin. Affected organs must be cut and burned.
So, Japanese spirea is often used to decorate sites. Very beautiful of these plants are low hedges. For this decor, you can plant one variety or mix several different varietal specimens in one planting.