The buddleia

How to irrigate buddleia

For the irrigation of the buddleia, during autumn and winter, the rains are sufficient, especially if abundant; during the summer season, on the other hand, it is necessary to water regularly and consistently, especially if there are prolonged periods of drought. The administration of water must therefore be carried out on the basis of rainfall and climate. It is absolutely important to avoid water stagnation, a frequent cause of rotting of the root system and, consequently, of a progressive weakness of the plant. In gardens, the ideal irrigation method is drip irrigation, also called by sprinkling, thanks to which it is possible to direct slender jets of water to the surface of the soil or to the root area, continuously or intermittently depending on the needs.

How to cultivate buddleia

This plant is multiplied by sowing or by semi-woody cutting; in both situations, the plant must be carried out in special containers filled with soil mixed with peat and, to a lesser extent, with sand. The seedling, after about a year, should be transplanted in the garden; this operation must be carried out carefully, so as not to damage the roots. The recommended soil is fertile, well drained and not very compact. Before planting in open ground, however, it is essential to work the soil, so as to turn and aerate the clods, using a spade or similar tool. It is recommended to practice pruning annually: diseased branches, dry ones and those damaged by factors such as cold and parasites must be eliminated with a disinfected tool.


The fertilization of the buddleia must be done monthly in spring, in order to obtain a luxuriant flowering; the ideal is a liquid fertilizer to be combined with irrigation water. This essential operation must supply the three essential macroelements, namely potassium, phosphorus and nitrogen: a lack of them would be very dangerous and would significantly slow down the growth of the specimen, as well as causing leaf chlorosis. Potassium, in fact, intervenes in the synthesis of proteins and in the production of ATP, phosphorus in the processes of metabolism and in strengthening the roots, nitrogen in the growth of the vegetative parts. No less important, however, are microelements such as magnesium, manganese, iron and copper which, in turn,

The buddleia: exposure, parasites, diseases and remedies

The recommended exposure for this plant is bright, sunny and, in addition, sheltered from cold winds, which could cause even serious damage. Moreover, parasites such as scale insects and aphids are dangerous: the former cause widespread yellowing of the foliage with consequent drying out, the latter suck the sap, ruining leaves and shoots. In both cases, natural remedies are highly recommended, such as white mineral oil against scale insects and nettle macerate against aphids. Fungal diseases such as rot and gray mold can also occur, caused by excessive humidity and water stagnation: in this case, it is necessary to intervene with specific fungicide products and burn the affected parts, so as to avoid the spread of the disease .

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