The flowering deciduous shrubs or herbaceous perennials in the wild grow in South and East Asia belong to the Kariopteris genus. In the modern classification, the plant belongs to the family Clear-cut, previously it was attributed to the Verben family. The genus includes 15 species, two of which (Kariopteris gray and Kariopteris Klandonen) are grown in culture.
The plant prefers sunny places, but painlessly tolerates light penumbra as well, provided that the site is protected from drafts and winds. Loves calcareous soil, grows on neutral. If the soil is acidic, you will have to lime, otherwise the plant will wither and eventually die. Heavy substrates should be avoided, as well as areas with a high level of groundwater, since under conditions of excessive moisture, the roots of karyopteris begin to soak and rot.
The culture is rather drought-resistant, even in dry years it does without additional irrigation, but the flowering in this case becomes less plentiful. Although, of course, if there is a possibility, in hot weather it is worth watering karyopteris, then the bush will be more fluffy, and flowering more spectacular. In addition, during the growing season does not hurt to provide the plant with additional nutrients. Top dressing is made twice a month, from spring to summer - nitrogen-containing, then nitrogen-free. You can use both organic and mineral mixtures for flowering.
Shrub tolerates a haircut, which contributes to a better branching. It is necessary to take into account some features. Pruning karyopteris held in autumn or early spring (before the awakening of the kidneys), because it blooms on the shoots of the current year. At the same time, the weak shoots are removed completely, and the strong shoots are cut so that each has 2 to 3 buds. Autumn pruning should not be done too early, before the onset of cold weather. Otherwise, the growth of new shoots will begin, which will not ripen to frost, but will deplete the plant.
Kariopteris is quite thermophilic (zone 5 - 6), therefore in cold climates it needs good shelter. With the onset of stable negative temperatures (from minus 1 to minus 5 ° C) pruning is carried out and a structure is constructed that will protect the plant from frost. It is important that the bush is completely isolated from moisture. Kariopteris does not tolerate overwetting even in warm weather, and against the background of exposure to low temperatures, this factor will definitely destroy the plant. Therefore, all work is carried out on a dry cold day. The ideal option would be an air-dry shelter - a stable frame covered with a layer of insulation (lutrasil, spanbond) and a waterproof layer (polyethylene). Tissue and film are pressed to the ground with heavy stones, and dry foliage can be poured into the structure. Some gardeners dig up karyopteris, place it in a pot and put it in a cool place, for example, in a basement. Here everything is individual.
The quality of the winter affects the state of the plant. If during the growing season it received enough moisture, while in the second half of the summer phosphorus-potash supplements were applied (and nitrogenous were excluded!), The winter resistance will be higher. Plants weakened and overfed with nitrogen overwinter.
Propagate karyopteris cuttings (green or semi-lignified) or seeds. Cuttings about 10 cm long are taken from the top of the crown. Greens can be rooted even in water, while semi-woody plants are planted in peat-sand mixture. You can use the stimulator of rooting, although even without this technique, the percentage survival rate is quite high. Planting requires shading and regular spraying. In the summer, it is desirable to create a mini-hothouse, and in the fall, cuttings can be planted directly in open ground. In the latter case, planting material is selected for winter hardiness. Those cuttings that survive the winter will need to be covered with a film in the spring.
Seeds of karyopteris are sown either before winter or in early spring right in open ground. With good care, you can count on a rich self-seeding. In this case, it remains only to choose the strongest seedlings and transplant when they get stronger.
This culture refers to the so-called express perennials. This means that with early sowing, flowering occurs in the same year. Numerous fragrant flowers of blue or white adorn the bush from mid-summer to mid-autumn (dates vary depending on climatic conditions). During this period, karyopteris attracted bumblebees, bees and butterflies to the garden. Due to the abundance of long staminate filaments in flowers, it seems that the shrub is shrouded in blue haze. Hence its popular name - “blue fog”. Leaves and flowers of the plant can tolerate light frosts (minus 1 - 3 ° C).
In the garden, karyopteris combines well with ornamental grains, rudbeckia, sage, letniki. It is planted in mixborders, borders, tubs. But when creating compositions, it should be borne in mind that in favorable conditions the shrub can reach a meter height and even exceed it.
Temperature conditions . In spring and summer, kari opteris are kept at a temperature of about 20 ° C, and in a dormant period - in a cool place with a temperature of 5 - 10 ° C.
Lighting . Brightly lit location with direct sunlight in the morning and evening. Variegated varieties of karyopteris need very good lighting.
Cariopteris at home . A very unpretentious plant that can grow even a beginner. Since the flowers appear on the shoots of the current year, the shoots of the previous year are pruned in the spring, every year. Too dense crown is thinned. Remove fading flowers of karyopteris to prolong flowering.
Substrate . Well drained soil, pH slightly acidic, neutral or alkaline. Add coarse river sand to the mix to improve drainage. Kariopteris loves soils rich in organic matter.
Top dressing . Every month, from early spring to autumn with liquid fertilizers. With an excess of nutrients, Karyopteris plentifully increases the green mass to the detriment of flowering. Positively refers to organic fertilizers.
Flowering time . July to September. The flowering period is long - at least 2 months.
Air humidity . Spray the foliage of the karyopteris periodically if the indoor air becomes too dry.
Soil moisture . Mature plants are drought-resistant, young ones need more frequent watering. In the spring and summer, allow the top layer of soil about 5 cm thick to dry out between waterings. In winter, just protect the soil from drying out.
Transfer . Adult plants are transplanted every 2 - 3 years in the spring.
Breeding . Cuttings of non-flowering shoots in July or August, 7–10 cm long. Rooting of karyopteris is carried out in moist sand.
Pests and diseases . Wet, poorly drained soil leads to plant rotting.
Cariopteris: description and speciesShrub karyopteris has the following description: plant hemispherical, compact form. The top of the hemisphere is covered with small flowers of white, blue, blue or violet color, and the bottom is bordered with carved leaves of silver-green color.
Flowers are collected in umbrella inflorescences, which, in turn, form paniculate inflorescences.
The height of the bush varies from one to one and a half meters. Stems erect, even. The leaves of the plant with notches on the sides, lanceolate, have a heady spicy-coniferous smell. In our region, the plant was imported from North China, Mongolia, and Central America. Natural habitat - mountain slopes, rocks.
Cariopteris gray. Inhabits a semi-handicraft plant in Japan, Korea, and Taiwan. Nuthook has woody slightly pubescent shoots. Plant height does not exceed 1.2 m. Leaves are narrow, oblong, yellow-green color. The flowers are small. Stems and leaves of a bush have a pleasant citrus smell. Blue fog blooms in the month of July.
Kariopteris Klandonen. For variegated colors, the Kladon walnut is also called variegated. Variegated kariopteris is derived from the hybridization of gray-haired and Mongolian karyopteris.
Leaves of hybrid varieties of this type of plant are oval, covered with villi, can be either single or two-colored (yellow-green, green-brown, light green with stripes along the edges). Color tubular flowers purple-blue. Plant height does not exceed one meter. Winter-hardy plant, originally from North China.
Kariopteris Forrest. This is a flowering semi-shrub plant with flowers of white-green or light-blue color. Leaves of gray-green color are oblong, oval, covered with fibers.
Cariopteris is sticky. A plant that reaches a height of one and a half meters. The leaves are oblong, narrow, shiny, sticky. Small flowers of lilac-blue color. Small shoots, buds and ovary covered with fibers. Gummy karyopteris blooms in early September.
Cariopteris tangut. Upright plant up to two meters. The pubescent shoots are gray in color. Oval-shaped leaves. Blue-violet flowers form a spike-shaped, dense inflorescence.Mongolian kariopteris. Semi-shrub plant with a height of 30 to 150 cm. The shoots are erect, brown in color, covered with villi. Leaves oblong, oval. Shrub blooms from August to October. The flowers are blue-lilac color.
Lighting for blue-eyed shrub
Karyopteris should be planted in an open, well-lit area. The terrain should not be purged, it is better that it is protected from drafts. Shrubs planted in the shade do not develop well, leaves and buds turn pale, losing their decorative appearance. Kariopteris with leaves of yellow shade looks more attractive in intensive sunlight.
What kind of soil loves karyopterisThe flower karyopteris prefers to grow in drained soil with sand impurity. Acceptable for plants are increased acidity and stagnation of moisture in the soil. The plant easily tolerates a large amount of lime in the soil. You can not plant a shrub in sandy soils.
Planting rules Karyopteris
In order for the shrub with blue flowers to grow in your yard, bringing pleasure with bright saturated colors and abundant flowering, you need to follow some rules. The rules are quite simple, but their implementation will already provide you with half the survival rate and successful development of the wallet.
How to choose seedlings for planting
Growing karyopteris, as a rule, is made by saplings or seeds.Choosing a sapling, carefully inspect it for rot on the stems and holes in the foliage. If there is even the slightest sign of damage, you should refrain from purchasing a seedling.
It is also undesirable to buy flowering seedlings, they can not settle down. A healthy seedling has a powerful trunk and is well pubescent with green leaves. Yellow leaves are a sign of a weak seedling.
If you decide to grow the nut from the seed, for low temperature hardening, seeds should be sown in late autumn or early spring. Acquired seedlings are best planted in open ground in mid-April. If the shrub is purchased in the fall, it is better to put it in a pot for the winter period and take it to a cellar for storage in the basement.
The technology of planting karyopteris in the garden
Kariopteris requires that planting and care be conducted as it should be done with respect to capricious shrubs. Planting plants is best done in groups.The depth of the landing pit should be 5-10 cm greater than the height of the earthen basal lump. The width of the pit make three times the width of the coma. The landing pit is necessarily drained, since the root system of the nut stalk rot when moisture stagnates. As the drainage used humus and sand.
If the seedling is purchased in a container, it must be carefully removed. The root system carefully straighten and place the seedling in the pit. Earthen room should be at the same level with the level of the soil. Sprinkle with earth and irrigate the seedling.
Karyopteris pruningShrubs karyopteris grown in the country, as well as grown houses, require regular pruning.
Since the color is formed only on the newly formed stems, the main pruning is carried out in early spring.
Shrubs are cut no higher than twenty centimeters from the ground level, giving them a spherical appearance.
Frozen and weak shoots pruned more, even at ground level. This method of annual pruning provides the ability to maintain a certain type of shrub. Autumn pruning plants is to remove the faded panicles. Every few years, the nuthead is rejuvenated by cutting it at least five centimeters above the ground level.
Features care karyopteris winter
While ensuring full moisture recharge during the season, Karyopteris will not freeze out in winter. In order for the shrub to endure wintering without harm, it needs to be covered. The soil around the shrub is covered with straw or sawdust, and the bush itself is wrapped with paper or sacking.When grown in harsh winters, the plant is cut for the winter and transplanted into a pot or container.
The transplanted plant is moved to a room with a temperature of not more than +10 ºC.
Once a month the plant is watered with a small amount of water.
How to multiply Karyopteris
Nutcracker propagated by cutting, layering or seed. Reproduction by cuttings carried out at the beginning of the growing season. For cuttings, cut stems up to 15 cm long and send them to take root in a jar, a greenhouse, or in a pot, covered with a jar. A greenhouse or jar is periodically opened for airing and watering.
Seed propagation. At the end of winter or at the beginning of spring, seeds are sown in pots with a special substrate. Seeds gently scatter on the surface of the soil, without having to sprinkle with earth. The container is covered with polyethylene, which is periodically cleaned for ventilation and watering.Seedlings germinate within two weeks. When two or three leaves appear, they dive. In open ground seedlings are planted not earlier than the beginning of May.
Reproduction by layering. To get a quality bush, a slightly stiff stem is clamped with a bracket to the ground surface and sprinkled on top of the ground.
Major diseases and pests, difficulties in growing shrubs
Kariopteris is a shrub resistant to diseases and pests. Sometimes he may be bothered gadflies or rot.
Rot appear when the soil is over-wetted. If you find signs of decay, the plant needs to dig up and trim rotten roots. Having relieved the karyopteris from the affected parts, it is transplanted into a new landing pit with drainage.
The appearance on the leaves of the plant dotted lines of holes and small dots indicates the defeat of his blindflies (grass bugs). Get rid of blindfly by spraying the bush with biological products.