Heavy frosts can generate problems in citrus trees. When they appear outside the vegetative rest that all plants have during the winter they can affect the different vital functions such as germination, flowering or fruit ripening.
They can have different origins: they can be advection frost or thermal inversion frost.
The advection frost They arrive together with the polar wind, a cold wind that usually does nothing, the plants freeze on contact with the cold wind. It affects more the part of the tree that is exposed to the wind.
Thermal inversion frost or radiation frosts are caused at not too cold nights, in which the hot air reaches 12 meters high (approximately) and on the ground suffers from low temperatures.
For this problem there are different defenses, some use large fans, which are used in areas with low winds, sprinkler irrigation, stoves, bare vegetation and irrigated soil.
Depending on the aspect reached by frost they can be divided into:
- White frost or frost
- Black frost
The white frost or frost they form ice on the surface of plants as a result of masses of moist air. They appear in areas where there is no wind and there is a great cloudiness.
Black frosts are not formed by ice, but they can cause the death of plant tissues. They are favored with the existence of cloudiness and wind in the area.
If you want to avoid the problems generated by frost, we advise you to choose plants that can adapt to the garden conditions. If they live in areas of frost, species that can withstand them should be grown.
Too you should avoid cultivating those species that are more sensitive in the depressions of the garden. Keep the floor with a layer of loose cloth, which acts as an insulator and does not contain weeds.
Place some protectors near the plants such as cardboard or wood screens, cover the surfaces with a layer of compost, sawdust or peat.
Photo | Flickr
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