Florida’s winters are mild compared to most of the country, but plants still respond to the shorter days, cooler nights, and occasional freezes. Most don’t go fully dormant the way a maple in Michigan would. Instead, they slow down, shifting their energy in ways that range from subtle growth pauses to winter blooming, depending on the species and the region of the state.
Quiescence: Florida’s Version of Dormancy
In temperate climates, trees drop their leaves and enter a deep dormancy triggered by genetics and day length. In Florida, something different happens. Many subtropical and tropical plants enter a lighter state called quiescence, which is dormancy imposed by the environment rather than by the plant’s internal clock. Cool temperatures above freezing but below a species-specific threshold slow vegetative growth and signal the plant to stop pushing out new leaves and branches.
This matters enormously for fruiting. Lychee, longan, and mango trees need that winter cool-down to flower and produce fruit. Without it, they just keep flushing new leaves instead of blooming. This is already playing out in South Florida: lychee trees in Miami-Dade County now rarely flower or fruit well because winters have grown too warm to trigger quiescence. The trees keep growing vegetatively year-round, never getting the signal to shift into reproductive mode.
For gardeners and growers further north in the state, cooler winter nights still provide that signal reliably. But the pattern illustrates something important: Florida plants don’t just endure winter. Many depend on it.
How Cold Temperatures Cause Damage
Florida’s plant injuries from cold fall into two distinct categories, and understanding the difference helps explain why a 40°F night can hurt a tropical plant even though it’s well above freezing.
Chilling injury happens at temperatures above 32°F. Tropical plants are sensitive to anything below about 53°F (12°C), while subtropical species tolerate down to roughly 41–46°F (5–8°C) before showing stress. The damage is physiological: cell membranes lose their normal function, water movement inside the plant breaks down, and you see wilting, pitting on fruit skin, browning, or soft spots. These symptoms can appear within days of exposure.
Freezing injury is more dramatic. The National Weather Service defines Florida’s cold thresholds this way: a frost advisory covers 33–36°F on calm, humid nights; a freeze warning means 32°F or lower for at least two hours; and a hard freeze means 25°F or below. When ice crystals actually form inside plant cells, the cells rupture. You’ll see blackened, water-soaked leaves and stems that collapse as they thaw. Hard freezes can kill entire plants to the ground, particularly tropicals like hibiscus, plumeria, and bougainvillea that have no evolutionary preparation for ice.
Regional Differences Across the State
Florida spans USDA hardiness zones 8 through 11, so “winter in Florida” means very different things depending on where you are. In the Panhandle and North Florida, freezes are routine from December through February. Lawns go brown, deciduous trees (yes, Florida has some) lose their leaves, and nights in the 20s are not unusual. Plants here behave more like their counterparts in the lower South.
Central Florida occupies a transition zone where freezes happen but are less predictable, sometimes only a handful of nights per winter. This is where subtropical plants live on the edge, thriving most years but vulnerable to the occasional deep cold snap that sweeps through every few seasons.
South Florida, from roughly Palm Beach County down through the Keys, rarely sees freezing temperatures at all. Plants there respond to winter mainly through reduced growth rates driven by shorter days and slightly cooler nights, not through any real cold stress. The challenge in this region is the opposite: some plants don’t get enough winter chill to function properly.
Plants That Thrive in Florida’s Winter
Not every plant hunkers down. Florida’s mild winters create a window where certain native species bloom, taking advantage of reduced competition and the activity of winter pollinators. Butterweed and lyreleaf sage flower during the cooler months, providing color and nectar when little else is blooming. In North and Central Florida, blue phlox, Atamasco lily, and wild white indigo join them. Native blueberries, skyblue clustervine, and flatwoods plum also flower or fruit during this period.
Cool-season vegetables do exceptionally well. Lettuce, broccoli, kale, carrots, and strawberries are all winter crops in Florida, planted in fall and harvested through early spring. The state’s massive winter strawberry industry exists precisely because Florida’s cool season provides the right combination of mild temperatures and long daylight for production when the rest of the country is frozen.
How Growth and Water Needs Change
Even in the mildest parts of Florida, plant growth slows noticeably in winter. Shorter days mean less photosynthesis, and cooler soil temperatures slow root activity. This has practical consequences for how much water and fertilizer plants need.
Because growth slows, water requirements drop significantly. UF/IFAS Extension recommends cutting irrigation to no more than once every 7 to 14 days during winter if there’s been no rain, or roughly 50% of the normal schedule. If it has rained within the last 10 days, you can turn the system off entirely. Overwatering during winter is one of the most common mistakes Florida gardeners make, and it promotes root rot in soil that stays wet longer because plants aren’t pulling moisture out as quickly.
Fertilization should stop well before cold weather arrives. In North Florida, the last recommended application is September. In Central Florida, it’s October. Fertilizing too late pushes tender new growth that hasn’t had time to harden off, making the plant far more vulnerable to cold damage. That fresh, soft growth freezes more easily than mature tissue.
Protecting Plants During Freezes
When a freeze is forecast, covering plants is the simplest and most effective protection. Cloth sheets, quilts, and commercial frost cloths all work well. The key is draping the cover all the way to the ground to trap heat radiating from the soil, which is the main source of warmth for the plant overnight.
Plastic sheeting works too, but with an important caveat: any foliage that touches the plastic will likely be damaged, because plastic conducts heat away from the leaf surface rather than insulating it. If you use plastic, support it on stakes or a frame so it doesn’t rest on the plant. Remove plastic covers the next morning once temperatures rise, or at least vent them. On a sunny Florida winter day, the air trapped under plastic can heat up rapidly and essentially cook the plant you were trying to protect.
Mulching around the base of cold-sensitive plants adds another layer of insulation for the root zone. Even if the top of a tropical plant freezes back, healthy roots can often resprout in spring. Protecting those roots is sometimes more important than saving the foliage. For container plants, the simplest approach is moving them into a garage or covered porch for the night, since their roots are more exposed than those of plants in the ground.
What Recovery Looks Like After a Freeze
After a freeze event, resist the urge to prune damaged growth immediately. Frost-burned leaves and stems look terrible, but they actually provide some insulation for the tissue beneath them if another cold night follows. More importantly, it can take weeks or even months to see the full extent of the damage. What looks dead in January may push new growth from lower on the stem in March.
Wait until new growth appears in spring to prune. At that point, you can cut back to where green, living wood begins. Many tropical and subtropical plants that look completely dead after a hard freeze will surprise you by resprouting from the base or even from the roots once warm weather returns. Patience is the most important part of freeze recovery in Florida.