If you’re going for a tropical look, but don’t want to lose your landscape, then you’ll get some great ideas from this episode of “Gardening in the Panhandle LIVE!”.
Most of the Florida Panhandle falls within USDA Plant Hardiness Zone 9a. The USDA Plant Hardiness Zone Map displays the average annual extreme minimum winter temperature for locations throughout the United States. Based on NOAA weather data, the date of the last spring freeze can range from February 16 to March 15 depending on location in the Florida Panhandle. It’s important to note these figures are based on averages and will vary from year to year.
Some plants need protection from freeze events. More information on protecting plants from cold weather can be found in the article “Preparing the Landscape for Cold Weather”.
There are quite a few native plants that can give your landscape a tropical look. Plants that have a tropical look usually have bright flowers, variegated leaves, and/or coarse textured foliage. A native that comes to mind is Florida anise that grows well in shaded areas and is available in varieties with variegated foliage and light green foliage. The native firebush (Hamelia patens) will freeze back some years, but provides a tropical focal point with its showy flowers and unique foliage. Some oakleaf hydrangea selections with chartreuse colored blooms can also provide a tropical aspect.
Other plants that give a tropical feel, but aren’t native to Florida include cast iron plant, canna lilies, red hot poker, fatsia, farfugium, holly fern, African false hosta, and loquat trees. Some tropicals that freeze back, but will come back in the spring include ornamental gingers and tumeric. To view other suitable plants for the Florida Panhandle check out the Florida-Friendly Landscaping Plant Guide.
Row covers and frost cloths can provide some insulation for sensitive plants. The thickness of the material used can vary significantly and offer different levels of freeze protection. It’s important the material covers the plants all the way to the ground, not just the foliage. More information on row covers in the article “Using Row Covers in the Garden” from the University of New Hampshire.
It’s important to wait to clean up and prune freeze damaged plants. Mid-to-late March is a good time to cut back plants that have been damaged from a freeze event. However, the longer you wait the better. More information for caring for these plants can be found in the article “Treating Cold-Damaged Plants”.
Coastal climates differ from mainland environments. In the winter, temperatures in these two places will be similar, but windchills may be exaggerated in coastal areas. Additional wind tends to dry plants out faster, but spots near water may allow for some experimentation with more tropical plant material.
Snowman in the Garden. Photo Credit: Abbey Smith, UF/IFAS Extension
2025 has already been a year for the books, as Winter Storm Enzo has proven that it really can snow in the Sunshine State. With the fluffy white snow also comes below freezing temperatures, therefore most landscape plants that fit the hardiness zones of Florida are not cold-tolerant or what is also called “cold-hardy.” In the Florida Panhandle, freezes are becoming more prevalent in recent years, so it is best to act ahead of time to protect your patio and landscape plants from feeling the adverse winter affects.
Preparation in Advance
Gardenia bush in the snow. Photo Credit: Abbey Smith, UF/IFAS Extension Jackson County
It is always best to do your research and know what hardiness zone(s) your plants will thrive in. This will help you understand the level of cold tolerance the plant can withstand and will allow you to select cold tolerant varieties that will grow best in the Florida Panhandle. You can find your hardiness zone by using this link: https://planthardiness.ars.usda.gov/.
Proper care throughout the year will also help your patio and porch plants withstand freezing temperatures; a healthy plant has a better chance of recovering from cold damage than an unmaintained one. A freeze event can usually be spotted in the forecast multiple days in advance, and it is best to be proactive by moving potted plants that would be adversely affected to the indoors or to a warmer sheltered area.
Cold Protection Tips
One of the most effective ways to protect your plants from cold weather is covering them up during the night. Frost cloths can be purchased at most garden stores or through online platforms. If you are unable to buy frost cloths, you can use breathable materials such as old bed sheets or burlap bags that will still allow for air flow to the plant but keep it insulated and warm.
Example of frost cloth protection. Photo Credit: Molly Jameson, UF/IFAS Extension Leon County
You can also use mulch for insulation. Applying a thick layer of mulch around the base of your landscape plants will help insulate the soil to regulate ground temperatures and protect the plant’s root system from cold weather damage. Pine straw or leaves will work best and should be applied in a 3-to-4-inch layer kept away from the base of your stem or trunk of the plant. In some cases, it may be necessary to use an outdoor heat lamp, but always ensure that it is placed away from any flammable materials and only used as needed.
It has been said that using your irrigation at home can be a form of freeze protection. This is typically not effective for a homeowner. When farmers run irrigation to protect their crop, the irrigation systems that are used commercially are designed for scenarios like this. The irrigation must be run for several hours after temperatures rise for this method to work and protect the plants. With a home irrigation system, this is considered water-wasteful and the amount of water a home irrigation system emits can turn into heavy ice quickly, which will damage your plant rather than offer protection.
Cold protection for plants in Northwest Florida is all about preparation. Whether its covering plants, adding mulch to your landscape, or moving your plants indoors, a little effort can go a long way in preventing cold damage. With a bit of TLC, you can keep your landscape and garden beautiful all year long.
Many of us experienced our first freezing temperatures in the Panhandle last week. As we welcome winter, here are some helpful resources to prepare your plants when temperatures dip in the months ahead:
One tip you’ll often see in these recommendations is to water your plants before a freeze. At first, this might seem counterintuitive, but wet soil can actually help your plants weather freezing temperatures for several reasons.
Soil naturally has small pockets of air. UF/IFAS Photography: Tyler Jones.
Water’s ability to absorb and hold heat—known as high specific heat—makes it a powerful tool against cold stress. Dry soil contains air spaces that don’t hold heat well. By watering your soil, you replace those air pockets with water, which absorbs more heat during the day and releases it slowly at night. This helps keep the soil and roots warmer than the surrounding air. Covering plants with sheets and frost cloth can help trap this warmth around the plants.
Dehydration from freeze damage can make leaf tissue look similar to drought stress. UF/IFAS Photo by Cat Wofford
Beyond heat retention, water also reduces the effects of cold stress. Both freezing and drought conditions cause plant cells to lose water, leading to dehydration. Water is essential for many plant functions including photosynthesis, nutrient transport, and maintaining structural support of the plant. Good water availability within the plant before the freeze helps reduce the water stress associated with cold damage. However, watering right after a freeze will not provide the same benefits because root activity slows in the cold weather.
For best results, water the soil in the morning before a freeze, focusing on the soil, rather than the leaves, as wet leaves are more prone to freeze damage. During fall and winter, plants generally require less frequent watering, so check the soil moisture before watering to avoid overwatering. Standing water can harm roots and increase stress on the plant.
Get familiar with your soil by checking moisture level before you water. UF/IFAS Photo by Tyler Jones
Anchor frost cloth securely to keep it tightly in place, as removing air gaps helps trap ground heat and shield plants from cold air. Photo by Molly Jameson.
Here in North Florida, mild winters are the norm, but our occasional cold snaps can be enough to wreak havoc on our gardens. As you might remember, in December of 2022 the entire Panhandle experienced temperatures dipping into the teens and low 20s for several nights in a row, with some areas reaching as low as 18°F. This kind of unexpected freeze can catch even the most experienced gardeners off guard.
While plant covers are the go-to solution for many of us, pairing them with additional techniques can offer even better protection when temperatures dip. From common cold weather protection myths to practical DIY tips that enhance your plant cover’s effectiveness, knowing your options can make all the difference during an impending cold snap.
Cold Protection Myths and Misconceptions
When a frost or freeze warning hits, there’s plenty of advice flying around. Some of it’s helpful, and some, not so much. Here are a few misconceptions to clear up:
“Lollipop” trees will allow the heat from the ground to escape, giving the tree no cold protection. Photo by Jonathan Burns.
“It’s All About Covering the Leaves”
Many gardeners believe that simply covering the leaves of their plants will provide adequate protection. However, this can lead to what’s commonly referred to as “lollipop” trees, where only the foliage is covered, leaving the trunk exposed. This is problematic because cold air can still penetrate, and the heat rising from the ground isn’t captured effectively. To ensure proper protection, the plant cover should touch the ground all around the plant to trap heat radiating from the soil, providing insulation from below. For best results, choose a medium-weight frost cloth (about 1 to 1.5 oz/yd²) made from breathable polypropylene or polyester fabric. These materials offer excellent insulation, providing about 4 to 8 degrees of temperature protection, depending on factors like cloth weight, ground heat trapped, and wind conditions. Frost cloth also allows moisture and air exchange, which helps prevent overheating on sunny days.
“A Plastic Sheet Works Just as Well as Frost Cloth”
Throwing a plastic sheet over your plants might seem like an easy fix, but it often leads to more harm than good. Plastic is non-breathable, which can trap condensation and freeze on the plant’s surface. It also doesn’t insulate well, transferring cold temperatures directly to the leaves and stems. If you must use plastic in a pinch, make sure it doesn’t touch the plants directly and that it’s securely anchored to the ground to effectively trap warmth. Be sure to remove it in the morning once temperatures start to rise to avoid overheating.
“Covering Your Plants Alone is Enough”
With PVC hoops ready to hold frost cloth and a thick layer of pine straw mulch, these raised beds are prepped for whatever winter throws their way. Photo by Molly Jameson.
While covering plants is crucial, sometimes additional steps can make a big difference. Mulching around the base of plants with a thick layer of pine straw or leaves helps insulate the soil and trap ground heat. It’s a small step that offers big protection to the roots and lower stems.
“Watering Plants Before a Freeze Doesn’t Help”
Watering the soil around your plants before a freeze is a good practice because moist soil retains heat better than dry soil. This can help keep the root zone warmer overnight. However, it’s important to focus on watering the soil rather than the leaves. Water on foliage can freeze and cause damage, so it’s best to keep leaves dry as the temperatures drop. A deep watering a day or two before the cold hits is ideal for giving your plants a fighting chance.
DIY Cold Protection Solutions
If expensive greenhouses and plant covers are out of your budget or you want to get creative, there are plenty of do-it-yourself solutions for protecting your plants:
Recycled Materials as Frost Protection
Old bedsheets, towels, or even buckets and cardboard boxes can be used in a pinch to cover smaller plants. Just be sure to anchor them down well, so they don’t blow away.
DIY Hoop Houses
A temporary hoop house can be constructed using PVC pipes as the frame and polyethylene film as the covering to protect cold-sensitive plants during freezes. Photo by David W. Marshall.
For taller or sprawling plants, construct simple hoop houses using PVC piping with breathable frost cloth or lightweight plastic sheeting. Unlike placing plastic directly on plants, hoop houses create an air gap between the plastic and the plants, which helps trap heat from the soil while preventing direct contact damage. If using plastic, seal it tightly at night to trap warmth, and open it partially during the day to prevent overheating or excessive moisture buildup as temperatures rise. These low tunnels are perfect for garden beds or fruiting plants that need a little more room under cover.
String Lights for Added Warmth
For extra protection, consider using outdoor-rated incandescent string lights (not LEDs, which don’t produce heat). Drape the lights around or near the plant under the covering to create a gentle source of warmth, which can raise temperatures by a few degrees on especially cold nights. For fire safety, keep lights from direct contact with dry materials and use only moisture-safe, outdoor lights.
Windbreaks to Stop the Chill
In areas with open landscapes, cold winds can make frost damage even worse. Planting a hedge or using temporary barriers like hay bales or pallets can shield your garden from icy gusts and protect your more delicate plants.
One of the best ways to prepare for cold snaps is to plant cold-tolerant varieties suited to North Florida’s climate. Vegetables like collards, kale, and carrots, or perennials like rosemary and garlic chives, can withstand mild freezes with little effort. If you’re growing fruit trees, look for varieties with proven cold tolerance or dwarf varieties that are easier to cover.
With a little planning and a few simple techniques, you can protect your garden from unexpected cold spells and keep it thriving through our chilliest nights.
The widespread multiple night hard freeze that occurred in North Florida near the end of December 2022 resulted in numerous citrus trees becoming severely damaged. The above ground portion of many of these trees died as a result of the extreme cold.
I talked with numerous homeowners who were concerned about their citrus trees following that weather event. Many of these homeowners earnestly and hopefully watched for any sign of new growth on their cold injured citrus trees the following spring. When new growth appeared from the lower portion of the trunk and from the roots, the homeowner became excited with a false sense of hope that their citrus tree had survived and would again produce an abundance of desirable fruit.
Cold injured citrus tree with new growth coming from rootstock. Credit: Larry Williams
Now in the spring of 2024, many of these citrus trees have somewhat regrown from those root shoots, not from the completely dead tops. In most cases, the freeze damaged, dead tops of the once large trees have now been pruned away to allow the multitude of small diameter vigorous green shoots to grow.
Most purchased citrus trees are grafted. So, what survived and is now regrowing is coming from the rootstock, not from the original, desirable, edible fruit producing top. That desirable top was completely killed.
To better understand this scenario, perhaps a basic definition of grafting will help. This definition was taken from a University of Missouri Extension publication on grafting. “Grafting is the act of joining two plants together. The upper part of the graft (the scion) becomes the top of the plant, the lower portion (the understock) becomes the root system or part of the trunk.” Understock is also known as rootstock.
Grafting involves joining two different individuals. These individuals have to be closely related. For example, citrus can be grafted to other types of citrus and peaches can be grafted to other types of peaches. But citrus cannot be grafted to peaches.
The rootstock was selected because of some beneficial trait(s): resistant to a root pest, superior cold hardiness, imparts a dwarf growth habit to the top, etc. But the same rootstock produces undesirable fruit: bitter, hard, extremely seedy, etc. The top (scion) was selected because of a superior fruit: sweeter, bigger, more disease resistant, etc. But the same scion produces an inferior/weak root system. So, grafting the two together allows for the “best of both worlds.”
When all that is left is originating at or below the graft union or rootstock, the eventual resulting fruit will usually be undesirable, sometimes not edible.
So unfortunately, the best option in this scenario is to start over with another healthy grafted tree that is well suited for the potential cold weather of extreme North Florida.
Fall, winter and even early spring can be a rollercoaster ride of temperatures here in Northwest Florida. One week it dips to freezing for a short time and the next week it rises to spring-like temperatures. We need to hold on for this ride of up and down temperatures and not overreact too soon.
Following the sudden ride down to the lower temperatures, we may think winter is over. But we don’t see the next drop in temperatures that’s coming, as we are experiencing the ride upwards in temperatures.
On average, it’s not until we reach mid-March that we expect our last killing frost. A killing frost is heavy enough to kill tender plant growth. And, we can have light frosts well into the latter part of March and into early April. This is particularly true in the more northern portions of our Panhandle Counties.
The main point is to not get spring fever too early and encourage new plant growth by pruning or fertilizing too soon.
When landscape plants freeze, the first impulse may be to get out the pruning shears and cut away dead and dying leaves and branches. But this isn’t a good idea. Pruning can force new tender growth that is more likely to be injured by the next freeze. And, you can’t tell how much damage has been done until plants start new growth in spring. If you prune immediately after a freeze, you may cut away live wood that doesn’t have to be lost. Also, leaves and branches, which have been killed, can help protect the rest of a plant against further cold injury.
Some people want to “jump start” their lawns before our weather will allow our grasses to grow. Waiting allows for more efficient use of the lawn fertilizer. You will not injure your lawn by waiting but you can certainly injure your lawn by fertilizing too early.
So, have patience, allow your lawn to green up on its own and then fertilize, even if it’s not until April or May.
Finally, be a little philosophical. If you do lose one or two of your tender ornamentals, so what? Worse things could happen. And now you have a chance to add something new, perhaps some species native to our area that is not as subject to cold damage.
Even with this winter/spring rollercoaster ride, with thousands of plants to choose from and a generally mild climate, who can complain?
