Spirea Shirobana (Genpei) in landscape design
An excellent solution for the exclusive decoration of a personal plot is to plant a surprisingly beautiful, fragrant undersized shrub - Genpei spirea, the decorativeness of which is preserved from spring to late autumn. What are the features of growing the described plant, and how to properly care for it - more in the article.
Japanese Spirea Genpei (spiraea japonica genpei) is a perennial artisanal, summer-flowering, fast-growing plant, characterized by endurance, excellent adaptation to any climatic conditions, and high frost resistance. Thanks to such qualities, culture perfectly survives in almost all regions of the state.
It is advisable to start the description of the bush with its appearance. Spirea has a neat, dense, rounded crown, up to 0.8 m high and 1.2 m wide. Branches are felt-pubescent, they are distinguished by a red-brown color. Every year, shoots give an increase of 15 cm. The green mass of Jenpei is represented by numerous serrated leaves, narrow-lanceolate leaves, up to 2 cm long. The color of the foliage is dark green.
During the flowering period, which falls at the beginning of July, flowers of a three-color color are formed on a shrub of incredible beauty: white, white-pink and red-lilac. Flowers are collected in one large flat inflorescence of a thyroid form. It should be noted that the flowering of culture continues until the end of September.
In landscape design
Of particular importance is Japanese spirea for the field of landscape design and street art. In the People's Republic of China and Japan, plants are planted everywhere: in parks, personal plots, gardens.
Did you know? One of the most amazing varieties of spirea is Shirobana. Inflorescences of different colors — white, pink and purple — grow on one shrub.
The shrub, due to its short stature and high decorative qualities, is successfully used to create hedges, borders, retaining walls. In landscape design, it is used to fill empty space, for example, on the slopes, for the original decoration of gardens, parks and squares. The shrub looks great in various compositions of flowers, in particular, discounts, mixborders, flower beds, as well as among unfriendly stones. Spirea does not strive for leadership, so it gets along well with conifers, grass lawns.
Japanese Spirea has high adaptability to environmental conditions, however, for its good growth and development during planting, it is recommended to observe several important agrotechnical techniques.
High-quality, fresh and “lively” planting material is a guarantee of a good further development of the culture.
Important! It is especially dangerous to buy spirea seedlings over the Internet when there is no way to see the plant with your own eyes and test it by touch.
Therefore, when choosing seedlings, experts recommend paying attention to some important aspects:
- Roots. The root system of the plant should have moist, strong, elastic root processes, with no visible signs of damage, rot, pests or fungal infections.
- Branches. The seedling should have fairly flexible, durable shoots with buds.
By external signs, only a professional is able to determine the varietal affiliation of a seedling. Therefore, you should only buy material from trusted distributors or certified points of sale.A few days before planting, root roots and shoots need to be cut 3-5 cm, old, dry or damaged branches should be removed. The root system of the plant needs to be soaked for 2-3 hours in a container with water. A few hours before planting the material, it is recommended to coat its roots with a clay mash.
Japanese Spirea Jenpei belongs to the category of photophilous plants that prefer to grow in well-lit, sunny and warm areas. In partial shade conditions, the splendor of flowering culture is significantly reduced. The shrub responds well to nutritious, light, air- and moisture-permeable, fertile soil. When planting a plant on poorly drained soil, it is necessary to provide additional removal of excess moisture, which can lead to decay of the root processes.
Did you know? The average life span of Japanese spirea is 40 years. In ancient times, the plant was called as a meadowsweet.
Landing measures may be carried out in early spring, when the earth warms up a bit, or in the fall. It is better to arrange planting on a rainy or cloudy day when there is no scorching sun. A week before the estimated date of planting, you need to dig a hole and let it brew a little.
Spiraea planting technology is simple and consists of the following steps:
- dig a recess measuring 50 × 60 m;
- mix part of the removed soil with identical parts of peat, turf land and sand;
- at the bottom of the pit, line the drainage layer using broken brick or expanded clay;
- fill a layer of fertile soil on top of the drainage ball;
- gently lower the seedling into the pit, spreading its root processes;
- sprinkle the plant so that the neck of the root remains on the surface by 5-7 cm;
- Pour seedlings abundantly with settled cold water;
- Cover the trunk circle with a layer of peat mulch.
For group planting of bushes, the interval between them should be at least 0.5–0.7 m. When planting a crop to form a hedge, the distance between the bushes should be at least 0.4 m, between the rows - 0.3 m.
Regular and proper care for spirea is the key to its beautiful appearance, freshness and lush flowering. The plant is hygrophilous, therefore, requires regular watering. The lack of the required amount of water adversely affects the growth rate of the shrub and the quality of its flowering. In hot, dry weather, you need to moisten the culture every two weeks, using at least 10 liters of water under one plant.
Mandatory spirea care procedures include loosening and weeding the soil. The first event is carried out after each moistening, delving into the soil up to 6 cm. Loosening allows the soil to be enriched with oxygen and minerals, thereby accelerating the growth of the root system. As weeds grow, they are weeded. It is especially important to remove all weed plants before their flowering begins.
Despite the fact that Dzhenpei is characterized by excellent frost resistance, it does not hurt to cover it with winter agrofibre or any breathable breathable material, after having carefully bent branches to the soil.
To maintain the high decorativeness of the shrub, it should be regularly fed, at least three times per season. The first portion of fertilizers is recommended to be applied in the spring, at the initial stage of the plant’s vegetation. For this, nitrogen-containing products are used, the action of which is aimed at the growth of green mass.
In the middle of summer, it is recommended to nourish the shrub with fertilizers based on potassium and phosphorus, which contribute to the formation of flowers, strengthen the immune system of the plant, increase its resistance to diseases and pests. The last time the culture is fed in the fall, using also potassium-phosphorus preparations.
Japanese Jenpy, due to the high intensity of shoot growth, needs annual pruning, which is carried out in two stages. The first involves the removal of dry, damaged, weak and diseased shoots. In this case, dry or damaged branches are shortened to a living kidney. The procedure is carried out until the first leaves appear. The second stage of the circumcision procedure involves the formation of the crown, that is, giving the shrub an aesthetically attractive, well-groomed appearance.
Important! When forming pruning, you can not save, because the more branches to cut, the younger and healthier the spirea will look.
When the bush turns four years old, do a rejuvenating circumcision by completely removing all branches and leaving 30 cm of the trunk. It is important to remember that each pruning event should end with fertilizing the bush with a solution of manure and superphosphate, mixed in proportions - per 10 l of manure 10 g of mineral fertilizer.
Pest and disease resistance
Japanese Spirea has medium immunity and often suffers from various pests:
- Spider mite. Jenpei's biggest enemy, he feeds on foliage, buds, flowers, eats them, makes small holes, as a result of which the green mass turns yellow before time, dries and falls. The parasite is most active in dry weather. To combat it, modern broad-spectrum insecticides are used, for example, Karbofos and Acrex.
- Aphid. The pest eats plant juice, eats peduncles, sucks nutrients from leaves and young shoots. To cope with the parasite, spraying the bush with Pirimore's solution allows.
To avoid the appearance of pests, it is advisable to carry out simple preventive measures:
- regularly prune shoots;
- monitor the level of soil moisture, prevent excessive moisture;
- remove weeds;
- carry out professional spraying of the plant with special preparations.
Japanese Jenpei is an amazingly decorative shrub that will become a real exclusive highlight in the garden or infield. Proper care, regular top dressing and competent pruning will be able to provide the plant with good, nutritious nutrition, thanks to which it will flood with flowering until the first frost.