Frozen osmanthus rejuvenation

Frozen osmanthus rejuvenation

The osmanthus planted in open field has a minimum temperature of -5°C to -8°C tolerate in the north. If this limit temperature is exceeded, osmanthus must suffer from frost damage to varying degrees. Therefore, when planting sweet-scented osmanthus in the open field in the north, you should choose a sunny place, and then add artificial protection measures against winter, you can safely winter. In the winter protection of Osmanthus fragrans, after the winter solstice, the trunks are artificially tied with straw ropes or wrapped with other warming materials to prevent general freezing injury. In the coldest 30 days, the canopy of sweet-scented osmanthus can be wrapped in a transparent plastic film. Care must be taken to keep the air-permeable holes and allow the sweet-scented osmanthus to survive the cold winter.

If the ground-grown osmanthus is frozen without protective measures, it is necessary to take some rejuvenation measures according to the degree of frost damage. For example, the leaves of osmanthus fragrans trees are freeze-dried and the branches are not frozen. After the spring, artificial leaves can be removed and fertilized with thin water. Fertilizer should be added with appropriate amount of ferrous sulfate to make the root soil acidic and conducive to osmanthus flowers. Buds rejuvenate. If the shoots are frozen, artificially cut the frozen dead shoots, and then fertilize the thin water to promote its shoots. If the whole Osmanthus fragrans was frozen, it would be better to saw the dead tree trunks off at the upper end of the grafting interface, then strengthen the water and fertilizer management and promote the regeneration of new shoots. If possible, it is better to replant the new sweet-scented osmanthus so that it does not affect the landscape. The osmanthus roots excavated can be cultivated in the greenhouse to form a canopy of osmanthus.

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