What winter cold-protection and anti-freezing measures are there for garden plants?

With the arrival of cold winter weather, temperatures are about to drop sharply, and those plants kept outdoors are facing a severe test. Today, I will share a few top techniques for protecting garden plants from the cold in winter.

For small trees or shrubs with slightly weaker cold tolerance, such as holly and conifers, you can cover the area around their roots with a thick layer of organic mulch, such as decomposed leaves, dry grass or pine needles. This not only helps keep them warm and retain moisture, but also prevents root frostbite to a certain extent. The thickness of the mulch should generally be10 - 15cm; if it is too thin, the cold protection will be poor, and if it is too thick, it may affect the air permeability of the plant roots.

For some flowers and small plants that are not cold-tolerant, such as roses and hydrangeas, more careful care is needed. You can build a simple cold-protection frame around the plants; the frame can be made of wood or metal, and then wrap the frame with plastic film or cold-protection cloth to form a small "greenhouse." This can effectively block the invasion of cold wind and raise the internal temperature. However, note that at noon on clear days when the temperature is higher, you should appropriately uncover the film or cold-protection cloth to let the plants ventilate and breathe, so as to avoid pests and diseases caused by excessively high temperature and humidity.

Before winter arrives, proper pruning of garden plants is also an essential step. For deciduous trees and shrubs, you can appropriately prune the branches and leaves, cutting off overly dense, diseased, weak and leggy branches. This not only reduces the plant's nutrient consumption so they can concentrate their strength on resisting severe cold, but also improves ventilation and light transmission, reducing the risk of pests and diseases breeding in winter.

In addition to physical cold-protection measures, you can also enhance the cold resistance of plants through reasonable water and fertilizer management. In autumn, you should appropriately control the amount of nitrogen fertilizer applied and increase the proportion of phosphorus and potassium fertilizers, such as spraying potassium dihydrogen phosphate solution, to promote lignification of the plants and improve their cold resistance. At the same time, before the Minor Snow solar term, while the temperature has not yet dropped to an extremely low level, give outdoor plants one thorough watering so that the water penetrates deep into the soil. In this way, the soil moisture content increases, and after the temperature drops, a "thermal insulation layer" can form, slowing the rate at which the soil temperature falls, thereby protecting the plant roots from frost damage. It is best to choose the morning for watering, and if there is standing water after watering, deal with it promptly to avoid freezing at night and causing adverse effects on the plants.

Large potted plants in the courtyard, such as osmanthus and camellia, can be moved to a sheltered, sunny corner or indoors for care. If indoor space is limited, you can also bury the flower pots in the ground so that the pot rims are level with the ground, and then cover the surroundings with cold-protection materials. This not only helps keep them warm, but also makes them easier to manage.