Bonsai is losing leaves

When does the bonsai lose its leaves?

Bonsai, like all botanical species normally cultivated by man, are easily subject to pathologies and weaknesses due to poor or not completely correct care. Generally, bonsai are exotic species (especially ficus) and need sheltered environments for cultivation, but not excessively dry or constantly hot. Exactly when does the bonsai lose its leaves? The very first cause is root rot. It is always advisable to plant the bonsai in well-drained soil, mixed with river sand or fine gravel, to avoid stagnation of water. Normally a layer of moss is applied to the base of the trunk to maintain humidity, but the soil below should never be soggy. You will notice the excess water when the leaves begin to turn yellow and slowly fall off. The solution,

Direct sunlight

When the bonsai loses its leaves, however, it is not always synonymous with root rot. As we know, the bonsai needs a rather high ambient humidity, maintained by frequent nebulizations. The bright spot plays an essential role, as the bonsai benefits from this by expanding its foliage and thus growing luxuriantly. But be careful, bonsai need light, but not direct. The sun’s rays, especially if persistent, cause the humidity of the plant to dry quickly and weaken the leaves, which turn yellow and fall irremediably. The ideal would be to place the bonsai in a bright area that radiates from the sun for a few hours during the day (maximum three or four hours). In summer the bonsai can be placed outside, provided that in the hottest hours it benefits from the shade of another plant or a balcony. If the bonsai exposed to the sun loses many leaves, it is necessary to remove the burnt twigs, place it for some time in a cool place and spray it constantly with water. If necessary, apply a nutritional bonsai fertilizer.

Frequent movements of the bonsai

At home, the bonsai must benefit from a place with all the suitable characteristics: light, temperatures above twenty degrees during the day and below fifteen at night, and constant humidity of the environment and the ground. Bred in the same place, the bonsai adapts easily, growing well and without any problems whatsoever. However, if it is constantly moved, the established equilibrium falls apart, bringing the plant to considerable stress. Very often the bonsai are placed in the center of the tables, but they are moved when it is necessary to free them to set or use the surface; these actions are absolutely not recommended. The stress caused by displacement leads the bonsai to lose its leaves, due to a normal physiological procedure, but it becomes pathology if the new environment in which it is found does not satisfy the characteristics of the previous one.

Bonsai sheds leaves: Pests and diseases

Although it happens rarely, when the bonsai sheds its leaves it is likely that there is a pest infestation or bacterial / fungal disease. In summer, when doors and windows are open or the bonsai is outside, it is not difficult to attract potentially dangerous pathogens. By carefully inspecting the leaves, you can see (especially on the lower surface) numerous small yellow or green insects; the aphids, with their rostrum which pierces the cells of the plants to suggest their sap, cause serious damage to the plants if present in large numbers. Not infrequently they stay on the petioles or on the main leaf veins, slowly weakening them, thus causing the fall. In this case, it is good to get rid of unwanted guests as soon as possible, using organic insecticides (pyrethrum-based) or specific products for bonsai. bacterial or fungal infections, on the other hand, turn leaves yellow, causing holes or burn-like spots. Constant inspection is the key to avoiding these attacks.

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