How to irrigate the agastache

This elegant plant can be grown both in pots, indoors, and in the garden; in the first case, irrigation must be carried out regularly, two or three times a week, while in the second it must be carried out according to the rainfall trend. In fact, if drought periods occur, it is essential to intensify the watering, constantly paying attention to let the soil dry between one operation and the next. If, on the contrary, the rains prove abundant, and in particular if this happens in winter, it is necessary to provide the plant with a smaller quantity of water. The latter must be low in limestone, possibly demineralized. It is essential to avoid water stagnation: these, in fact, can cause root rot.

Tips for growing and caring

Agastache needs deep, cool, loose soil with good drainage. The planting of the seedlings purchased in the nursery must be carried out in a medium-sized container, filled with soil and peat mixed with a small amount of sand: subsequently, after a few months, the transplant can take place in the garden, in the ground, or in a pot with a larger diameter. Pruning should be done at the end of the winter season, so as to eliminate the branches damaged by the cold; those attacked by fungi or parasites, on the other hand, must be removed at any time of the year, immediately, in order to protect the rest of the plant. It is recommended to carefully disinfect the shears to be used, and to apply a scar after the operation.

How to fertilize the plant

A preliminary fertilization of the Agastache must be completed at the time of planting; we suggest the use of a natural product, for example manure. Subsequently, during the vegetative period, a liquid fertilizer suitable for flowering plants must be mixed with the watering water, approximately every fortnight. Alternatively, it is possible to use a slow release granular fertilizer to be administered to the specimen every three months: it must adequately balance, also on the basis of the chemical composition of the soil, three macro elements, namely potassium, phosphorus and nitrogen. One of their deficiencies is to be avoided absolutely, as it would lead the plant to an increasingly accentuated state of weakness and a slowdown in growth.

Agastache: Exposure, pests and diseases

This plant can develop perfectly both in sunny and semi-shaded environments; it is important, however, that the exposure takes place in rather spacious places and not affected by intense winds. An additional danger is represented by the black aphids, which attack the leaves, the shoots and the twigs by piercing them to suck the sap: among other things, in this way they cause numerous infections and various types of diseases. One solution is nettle macerate, an excellent pesticide, but the garlic infusion is also convenient, even easier to prepare. Fungal diseases are not frequent, but in the case of excessive humidity, rottenness at the roots or molds covering the foliage can occur; the most suitable remedy consists in the application of sulfur-based or copper-based fungicides.

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