What are the remedies for osmanthus trees after frost damage
What should you do if an osmanthus tree is frostbitten? What methods can save it? For osmanthus planted in the open ground, the lowest temperature it can tolerate in the north is -5°C to -8°C. Beyond this limit, osmanthus will suffer frost damage to varying degrees. Therefore, when planting osmanthus in the open ground in the north, you should choose a sunny, wind-sheltered spot and add artificial winter protection...
What should you do if an osmanthus tree is frostbitten? What methods can save it
For osmanthus planted in the open ground, the lowest temperature it can tolerate in the north is -5°C to -8°C. Beyond this limit, osmanthus will suffer frost damage to varying degrees. Therefore, when planting osmanthus in the open ground in the north, you should choose a sunny, wind-sheltered spot and add artificial winter protection measures so it can overwinter safely. For winter protection of osmanthus, every year after the Winter Solstice, manually tie the trunk with straw rope, or wrap the trunk with other insulating materials, which can prevent ordinary frost damage. During the coldest sanjiu period, you can cover the osmanthus canopy with light-transmitting plastic film, taking care to leave ventilation holes, so the osmanthus can safely get through the severe winter.
If open-ground osmanthus has not been given protective measures and is frostbitten, certain rejuvenation measures should be taken according to the degree of frost damage. If the leaves of the osmanthus tree are frozen dry but the branches have not frozen to death, after spring begins you can manually remove the dry leaves and give it light watering and fertilization. When fertilizing, add an appropriate amount of ferrous sulfate to make the root soil environment acidic, which helps the osmanthus sprout and rejuvenate. If the branches have frozen to death, manually prune away the frozen dead branches, then give light watering and fertilization to encourage branch and bud growth. If the entire osmanthus plant has frozen to death, choose to saw off the frozen dead trunk above the graft union, then strengthen water and fertilizer management to encourage it to grow new branches again. If possible, it is best to replant a new osmanthus at this time, so the landscape is not affected. The dug-out osmanthus roots can be specially cultivated in a greenhouse to form osmanthus bonsai.
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