Robinia bears its name in honor of V. Robin. He brought this plant from America to Europe. All species of Robin are grown as ornamental trees or shrubs.
Description of Robinia
There are about twenty species of deciduous trees and shrubs. They have large, pinnate leaves with prickles. The kidneys are hidden under the leaf scar. Flowers are located in large drooping racemes. They are white or pink, large, fragrant. Fruits - beans.
Types of Robinia
- Robinia pseudoacathy, or Acacia white- deciduous tree, reaching a height of thirteen meters. The shoots are thorny, greenish-gray or red-brown. Leaves are pinnate, consist of elliptical leaflets. The flowers are fragrant, white or pinkish, gathered in drooping brushes. The fruit is a brown bean.
White acacia has a large variety of decorative forms. They mainly differ in the shape of the crown:pyramid, umbrella There are differences in flower color and nature of flowering (white and pink), in shape and color of leaves (univalent, golden, dissected leaf), and also the form without spines.
- Robiniya is sticky reaches a height of twelve meters. Named so because its shoots and inflorescences are covered with sticky glandular hairs. There are no spines or they are very small. The leaves do not fall off for a very long time. The flowers are large, pink-purple, odorless, collected in erect small brush. The fruit is slightly glandular and bristly, also sticky.
- Robinia New Mexican- shrub or small tree, reaches a height of twelve meters. Prickly shoots of glandular-pubescent. The leaves are large, pinnate. The flowers are pink-purple, collected in thick, erect brush, odorless. Robinia New Mexico blooms from June to September with some interruptions. Fruits are ferruginous and bristly.
- Robinia bristle haired -shrub from one to three meters tall. All its parts are covered with long reddish setae. Shoots without spines. The flowers are pink or pink with a purple tinge, gathered in loose brush. Robinia blooms bristly with interruptions from June to September. The fruit is a ferruginous-bristly bean.
Growing up robinia
Any kind and form of Robinia grow quite simple. The most important conditions will be the presence of sunlight and the absence of stagnant waters at the landing site.
Robin is usually propagated by seed. Seeds are recommended to be collected from the most winter-hardy individuals. They are sown in the spring after scalding with boiling water and a twelve-hour swelling in the water. Reproduction is possible and root suckers. However, it is less productive. Dig up a piece of rhizome with a plant and plant it in another place.
A more effective way compared to reproduction by root suckers is reproduction by root cuttings. In the middle of May, carefully dig a few lateral roots of the plant. They are inclined planted in a loose substrate. The presence of sand in the substrate is very important. The upper cut of the lateral root is sprinkled with crushed coal and left slightly visible above the soil surface.
Propagation by stem cuttings is ineffective. They root poorly, sometimes only in hot summer. Many rooted cuttings also strongly vypryvayut already in the first winter.
All Robinia must be planted in early spring. When planting in the autumn, the roots damaged by digging from cold soil begin to rot. Do not plant Robinia too deep. All Robinians feel better on poor, loose soils than on rich and clayey soils.
Robin Pests and Diseases
Mite.The diseased branches are cut, the rest are treated with colloidal sulfur. After flowering, heavily infected Robinia are re-sprayed.
Mosaic. From this disease will help double spraying solution karbofos. In the prevention of healthy plants, vector control, removal of diseased individuals and weeds is necessary.
Use of Robinia
In small gardens Robinia are wonderful ornamental plants. Robinia is important to grow in a place where it is not threatened by the winds. Robin pineapple used to strengthen the slopes, because its roots grow in breadth.
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