Dried bonsai leaves

Dried bonsai leaves

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Question: Dried leaves of bonsai

My bonsai that I discovered after the cold had put so many new leaves, but with the strong sun they burned and dried all. What should I do? Thank you so much.

Answer: Dried leaves of bonsai

Dear Mary,
the complete loss of the foliage due to the scorching sun is due to the fact that your plant has passed from a protected situation to the open air; consider that whatever you used to cover the bonsai, it will also have served as a semi-shading sheet, thus causing the plant to live in a semi-shaded situation, not a full sun. So as soon as you removed the protections, the plant was sunburned. In these cases it would be advisable to make a gradual shift to increasingly sunny areas; if the leaves are still present on the plant try to position it in partial shade for a few days, and then slowly bring it more and more to the full sun. However, consider that most outdoor bonsai trees do not like the scorching sun for many hours a day; as well as ruining the leaves, the summer sun causes a rapid drying of the earth bread contained in the small bonsai pots, and therefore from June until September it is preferred to keep the outdoor bonsai in a semi-shaded area, or covered with a net shading; in this way they receive a good brightness, but without the sun rays burn the leaves and remove the growing medium. For the next year, I advise you to avoid covering the plant: outdoor bonsai live well outdoors, all year round; the covering with cloth (plastic or non-woven fabric) does nothing but obstruct the passage of light and water, which is also useful in a deciduous plant. A small tree that loses its leaves during the winter does not even fear frost, and therefore it can remain quietly in the garden or on the terrace, and moved to the bad weather, because it is in complete vegetative rest. Rather, in the case of a decidedly harsh climate, with temperatures lowering below 65 ° C, cover the vase with the woven fabric, so as to prevent the earthen bread enclosing the roots from freezing. In addition to this, where the scorching summer sun ruins the plants, the same sun, but in autumn and winter, it benefits the plants, making them live in a slightly warmer area. Usually the outdoor bonsai are then exposed to the sun plants from October until March-April; with the arrival of heat they move to a semi-shaded area, or they cover themselves with a shade cloth. Having the possibility, my bonsai in the garden live under a wisteria pergola: in winter there are no leaves, and the bonsai enjoy the full sun; when the heat arrives, the wisteria puts the leaves, acting as a shading sheet. In this way my outdoor bonsai remain in the same area every month of the year, and I live in Lombardy, so snow also falls on bonsai in winter.