Leaf and stem tissues are injured and damaged when ice forms within the plant’s cells, which typically occurs during a rapid freeze. Fruits and flowers are the least tolerant of cold injury because they have little ability to adjust or build up tolerance to colder temperatures. Plants that break bud dormancy become more susceptible to late frost because of their new, tender growth.Ĭold injury can occur to all parts of the plant (flowers, fruits, leaves, stems, trunks, roots, and buds). ![]() If temperatures increase during the winter months, some plants may break dormancy, or deacclimate, and begin leafing out or flowering. Sudden decreases in temperature cause more damage in fall or early winter than similar low temperatures well into winter. When temperatures gradually decrease, a plant can acclimate, or adjust itself, to withstand colder temperatures better. Temperature Changes and Plant DamageĪ plant’s ability to withstand cold temperatures depends on plant species, and how low and how fast temperatures decrease. It is important to protect plants from these cold temperatures. An example is the sudden drop in temperature in April 2019 that killed or severely damaged many plants. ![]() A late freeze after the temperature rises in January or February could be more injurious than the same cold temperature in winter when these plants have become dormant and more resistant to changes in temperature. Although we live in the South, winter sometimes brings cold temperatures that can cause severe damage to many of our landscape plants.
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