If your giant bird of paradise still looks smaller than it did before last winter, you’re seeing the lasting effects of cold damage. Across Beaches landscapes I’ve observed, large stalks died back—even where plants had some protection from buildings or surrounding landscaping. Many of those plants are growing again, but they haven’t regained their previous height or fullness. For badly damaged clumps, rebuilding that tropical screen is a multiyear process.

Jacksonville’s warmer hardiness zone designation can make tropical planting sound less risky than it is. Much of the area now falls in Zone 9b, but we still get temperatures cold enough to damage tropical foliage and kill established stalks. What matters is how cold it gets, how long it stays cold, and what survives underground.

Can Tropical Plants Stay Outside Below 50°F?

Some can, but 50°F is the point to start paying attention to your sensitive tropical plants. UF/IFAS explains that many tropical plants can develop chilling injury below that temperature without experiencing a freeze. Leaves can discolor, tissues can break down, and growth can slow. The damage depends on the plant and how long it remains exposed.

A short dip into the upper 40s doesn’t mean every tropical plant will die. Several cold nights, especially with cool days between them, create a different situation. Know what you’re growing and check its temperature requirements before cold weather arrives. “Tropical” covers too many different plants to serve as a reliable care instruction.

What Temperature Is Too Cold for Tropical Plants?

Think of the forecast as a series of warning levels. Around 50°F, review which plants need protection. In the 40s, chilling becomes a concern for sensitive species. At freezing and below, vulnerable leaves and stems face additional damage from ice formation.

These are planning ranges, not guaranteed survival limits. On clear, calm nights, leaves can become colder than the air around them. That’s why a plant can suffer frost damage even when a nearby thermometer stays above 32°F. The temperature at the plant matters more than the reading on your phone.

How Long Can Tropical Plants Handle Cold Temperatures?

There’s no universal answer such as “six hours below 50°F is safe.” Different plants respond differently, and prolonged exposure can turn a recoverable injury into permanent tissue damage. A brief cold night followed by a warm afternoon gives plants a different experience than several cold nights with little daytime warming. Look at the entire cold spell, not just its lowest temperature.

USDA specifically identifies cold duration as a factor in plant survival. Check the hourly forecast, the afternoon high, and how many cold nights are coming. If you grow valuable tropical specimens, place a minimum-temperature thermometer near them. You may discover that one planting bed gets considerably colder than another.

Is Jacksonville in Hardiness Zone 9a or 9b?

Jacksonville has both zones. The USDA map released in November 2023 moved roughly half of Duval County from Zone 9a to Zone 9b. UF/IFAS identifies areas inside the I-295 loop and nearly all areas east of it as Zone 9b. The rest of the county remains in Zone 9a.

Here’s what those numbers mean: Zone 9a has an average annual extreme minimum temperature of 20–25°F, while Zone 9b has 25–30°F. Zone 8b, which appears in older descriptions of parts of Northeast Florida, represents 15–20°F. These ranges describe the average of each year’s coldest temperature over a 30-year period. They don’t set a limit on how cold a future winter can get.

What About St. Johns, Nassau and Clay Counties?

St. Johns County also moved from Zone 9a to Zone 9b, according to its UF/IFAS Extension office. Nassau County’s coastal areas are generally Zone 9b, while inland areas remain Zone 9a. Clay County includes both 9a and 9b on the updated map. Check your location rather than assuming everyone in your county has the same conditions.

You can check your property on the USDA Plant Hardiness Zone Map. Then look at where the plant actually grows. A sheltered bed near a building can behave differently from an exposed corner or a low spot where cold air collects. Those small differences don’t always appear on the map.

How Cold Did Jacksonville Get Last Winter?

Jacksonville’s reported low reached 22°F on January 16, 2026. February brought another cold stretch: 22°F on February 1, 23°F on February 2, and 26°F on February 3. The high on February 1 was only 43°F. That meant an entire day below 50°F, followed by more freezing nights.

This was more than a quick overnight chill. The National Weather Service’s February 1 discussion described strong northwest winds and another widespread freeze expected the following night. Those official readings document Jacksonville’s cold spell, but they don’t tell us exactly how many hours each Beaches yard spent below freezing. That requires measurements from the property or a nearby weather station.

Why Did Giant Bird of Paradise Die Back at the Beaches?

The tall, banana-leaved plant is giant or white bird of paradise, Strelitzia nicolai. It’s different from the smaller orange-flowering bird of paradise. Extension recommendations for the giant species vary: an older UF reference includes Zone 9b, while NC State Extension recommends Zones 10a–11b. In Jacksonville, treat it as a cold-sensitive plant whose mature growth can be lost during a hard winter.

In the Beaches landscapes I observed, the damage went beyond brown leaves. Large stalks died, taking years of height and screening with them. Some plants had partial protection and still suffered substantial losses. When damage reaches the Beaches, where the ocean usually moderates winter temperatures, it points to even greater risk for tropical plants farther inland. Inland properties generally lose that coastal temperature buffer, although the damage at each site depends on the plants, shelter and duration of exposure.

A building, fence or surrounding plants can reduce exposure without keeping the air warm enough to prevent injury. UF/IFAS explains that windy freezes are harder to protect against than calm-night frost. During a prolonged cold outbreak, even a sheltered planting can remain cold for hours. “Protected location” should mean reduced risk, not guaranteed protection.

Will Cold-Damaged Bird of Paradise Grow Back?

If the clump is producing healthy new shoots, some living tissue survived. That’s encouraging, but new shoots don’t restore dead mature stalks. They have to grow and replace the height and fullness that disappeared. A plant can survive while the landscape loses much of what that plant provided.

The heavily damaged clumps I’ve observed are still rebuilding. They haven’t returned to their prewinter size, and those that lost their largest stalks can need several growing seasons to get there. Recovery depends on how much survived and whether another cold spell damages the replacement growth. Homeowners should plan for that delay when deciding whether to keep, supplement or replace a damaged planting.

When Should You Cut Back Cold-Damaged Plants?

Don’t rush to cut everything down after a freeze. UF/IFAS recommends waiting for new growth when you’re unsure which tissue survived. Damaged foliage can also provide some insulation during additional cold weather. Severe damage may take time to reveal itself fully.

With giant bird of paradise, assess individual stalks instead of treating the whole clump as dead. Preserve healthy growth and have unstable or questionable stalks evaluated. Take photos so you can compare progress through the growing season. That makes it easier to judge whether the plant is rebuilding or continuing to decline.

When Should Jacksonville Homeowners Prepare for Cold Weather?

Start in fall, while there’s time to identify vulnerable plants and get supplies. Decide which containers can move indoors and which landscape plants can realistically be covered. Put covers in place before the cold arrives and extend them to the ground to retain soil heat. Covers have limits during severe cold, especially around large specimens.

Also consider what happens if a tropical plant loses its mature growth. If giant bird of paradise supplies your entire privacy screen, one damaging winter can leave that space open for years. Use locally proven, cold-tolerant plants for essential screening and add tropical specimens where you can accept occasional damage. You can enjoy a tropical landscape while planning for Jacksonville’s winter temperatures.

We Welcome Your Thoughts. Which tropical plants suffered damage in your yard last winter, and how are they recovering?