The Wisteria in pot is a climbing plant native to China that is widespread in terraces and gardens throughout Italy. The scientific name is Wisteria and belongs to the family Fabaceae, subfamily Faboideae, a genus that in nature exceeds 20 meters high and 10 meters wide.
The characteristic of this plant is that it twists to the surfaces, whether grown in pots or in the ground; the trunk is shaped on the structures around which it grows, forming beautifully scented covers in the arches of gardens or on terraces. In order to obtain beautiful blooms both in spring and in summer, it is necessary to adequately moderate the irrigations.
In order to have compact, collected and very perfumed flowers, it is necessary to water a little the Wisteria, increasing slightly as soon as it is planted. When it has taken root, the water should be given according to the dryness of the soil and the exposure, which should still be very sunny. The water is to be administered with parsimony, as too much of it can easily develop diseases and parasites.
Moisten the soil when it is dry and spray the stem a little once a week will be more than enough.
How to cultivate
The Wisteria in pots or planted directly in the ground in the garden, adapts well to any type of soil, before planting it must be taken into account that it will become a very large plant and woody if it finds ideal conditions. Growing roots may break the pot, so the container must be large enough for fast root development. The plant grows quickly in height and width, twisting around everything it finds, damaging or breaking any obstacles on its path, such as tiles and gutters.
The ideal soil is slightly acidic, sandy and completely lime-free. Demineralised water should be given in this respect, because limestone is particularly annoying for the development of the plant. Wisteria in pots can withstand temperatures as low as -15°C. It also grows well in the shade but only blooms in full sun.
To keep the plant healthy from one year to the next, flowers and dry branches must be removed at the end of flowering and of course, being a climbing plant, it must be potted next to a support where it can develop.
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How much and how to fertilize
In addition to the care of the soil and the thrift in the administration of water that contains little limestone, the fertilizer is essential to make flourish all species of Wisteria. The ideal mixture must have a very low nitrogen content, otherwise the green parts of the plant will develop rather than the flowers. The fertilizer must be very rich in potassium and iron, which can also be administered separately.
The substrate must be irrigated with demineralised water mixed with iron sulphate, in order to make the soil more acidic. Fertilizer should be given in early spring when there is flowering and during the hot season. Double-flowering species should be fertilised both during the first and second flowering period in order to keep the flowers beautiful, resistant, compact and fragrant for as long as possible.
During the rest of the year the Wisteria can withstand very well cold temperatures, little or no irrigation and does not need fertilizer. The humidity of the air and the rain are enough for him to live when he does not have the flowers; it is useless, indeed harmful, to give too much fertilizer, because it can lead to various problems for the plant.
Wisteria in pots: Diseases and remedies
The Glicine in pot prefers a luminous exposition in full sun, because in the shade it will hardly bloom and it is victim of all the diseases which afflict the climbing plants. It is necessary to pay attention that the soil is rich of iron, otherwise it will get sick of leaf chlorosis, which is identified with the fall of the leaves, which become yellow and dry.
Wisteria is one of the preferred preys of cochineal, which should be eradicated immediately, otherwise it will quickly infest the entire plant. Lice and aphids are other parasites that live willingly on climbing plants and sometimes are not seen, but you can see their presence from the plant deformed or has an abnormal growth.
At the first signs of something wrong, it is necessary to intervene promptly with suitable insecticides or, in case of fungi, with the fungicides that are on the market in all the shops of plants and flowers. When the wisteria reaches a large size it is not easy to notice in time the attack of some parasite and it is a good idea to proceed with preventive measures just before spring, a period in which the eggs of most pests hatch.