2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Hydrangea prickly (lat. Hydrangea aspera) - flowering shrub; a representative of the genus Hortensia of the Hortensia family. He is a native of Central China. It is widely used for landscaping in regions with a warm climate; it is not grown in central Russia due to insufficient frost-resistant properties.
Characteristics of culture
Hydrangea prickly is a deciduous shrub up to 2-2.5 m high with a wide spreading crown and weakly branched straight shoots, bending under the weight of large inflorescences. The root system is branched, shallow, produces offspring in large numbers, and grows strongly. Leaves are oval, lanceolate or ovate, pubescent with hard hairs, green, opposite, sitting on petioles covered with brown hairs.
The flowers are four-petal, lilac, collected in lush semi-umbellate inflorescences. The marginal flowers are white. The petals are bent, smooth, with smooth edges. The prickly hydrangea blooms from early July to September. The fruits are inconspicuous bolls, ripen in the second decade of October, rarely ripen in central Russia. The growth rate is average, the annual growth is only 20-25 cm.
Growing conditions
Hydrangea prickly is an adherent of humic, fertile, slightly acidic, well-moistened, water- and air-permeable soils. Does not tolerate excessive dryness, lowlands with stagnant cold air and waterlogged areas. Unfavorable to compacted, heavy, clayey, alkaline and calcareous soils. When acidifying the soil, peat, sawdust, and needles are used. Lime cannot be used for acidification. The culture prefers a semi-shaded location. In sunny areas, prickly hydrangea should not be planted, since direct sunlight causes burns on the leaves and young shoots.
Landing features
It is recommended to purchase seedlings for planting in specialized nurseries. It is better to give preference to specimens with formed flowers and rich foliage. Plants with withered and brownish leaves and pale buds should not be purchased. It is unlikely that such seedlings will take root. The optimum age of the seedling is 4-5 years. Planting seedlings is carried out in early spring or autumn, the first method is considered to be more effective. The planting hole is dug twice as much as the root system together with the earthen clod.
It is advisable to lay a drainage layer on the bottom, and on top to form a mound of the top layer of soil mixed with peat, sand and mineral fertilizers (granular superphosphate, urea and potassium sulfate). The mixture for the mound and the laying of the hole is made at least 1, 5-2 weeks before the intended planting. The seedlings are carefully removed from the container along with the soil and planted so that the root collar is located a couple of centimeters above the soil level. The voids are filled with prepared soil mixture, slightly compacted, abundantly moistened and mulched with sawdust, tree bark or fallen needles. The distance between plants should be at least 1-1.5 m.
Care
For prickly hydrangea, annual feeding is important. After planting, the plants are fertilized no earlier than two years later. In the spring, hydrangeas are fed with urea (25 g), potassium sulfate (40 g) and superphosphate (40 g), the calculation is carried out per 1 sq. m. At the moment of bud formation, the second feeding is carried out with potassium sulfate (40 g) and superphosphate (30 g). The third feeding is carried out at the end of summer, as needed. Like other species of the genus, prickly hydrangea is hygrophilous. It is necessary to water the plants at least 1 time a week, with sufficient rainfall, the amount of watering is reduced to 1 time in 2 weeks.
It is important to remember that hydrangea does not tolerate dry soil, it cannot be allowed to dry out too much. Weeding and loosening are carried out as needed together with watering. Pruning of hydrangeas is carried out in early spring, dry and frozen shoots are removed from the bushes. Rejuvenating and thinning pruning is carried out periodically. Since prickly hydrangea cannot boast of frost resistance, for the winter it must be covered with spruce branches or any other non-woven material. With the onset of spring, the shelters are removed, but not all at once, but gradually.
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