Florida’s vegetable planting calendar runs almost year-round, but it is essentially flipped compared to most of the United States. Instead of cramming everything into a short window between the last spring frost and the first fall frost, Florida gardeners treat fall through spring as prime growing season and summer as the toughest stretch. The specific month you put seeds or transplants in the ground depends heavily on whether you are in the Panhandle or the Keys, and on whether the crop thrives in cool or warm weather.
Why Florida’s Planting Calendar Feels Backward
In most of the country, the growing season is bookended by frost. You plant after the last freeze in spring, harvest through summer, and shut things down when fall frost arrives. Florida has a frost threat too, particularly in the northern and central parts of the state, but frost is a brief visitor rather than a defining force. The real limiting factor for Florida vegetable gardens is heat. When daytime highs push into the mid-90s and nighttime lows stay in the upper 70s for months on end, most common garden vegetables struggle or fail outright. That makes the cooler months, roughly October through May, the heart of the vegetable gardening year.
With thoughtful planning, vegetables can be grown in every month of the year in Florida.1EDIS. Florida Vegetable Gardening Guide: SP 103/VH021, rev. 10/2015 But “can be grown” does not mean every crop works in every month. The trick is matching each vegetable to the right seasonal window for your part of the state.
Cool-Season Crops and When They Go In
Cool-season vegetables are the ones that bolt, turn bitter, or stop producing once temperatures climb. Think lettuce, broccoli, cauliflower, cabbage, kale, carrots, beets, radishes, peas, and spinach. In North Florida, these generally go into the ground between September and February. Central Florida gardeners can start a bit later in September or October and keep planting into February or early March. South Florida’s mild winters extend the window even further: you can often plant cool-season crops from October all the way through January or February without much frost worry.
The critical thing with cool-season crops in Florida is not waiting too long in fall. If you delay planting broccoli or cauliflower until December in North Florida, the heads may not size up before warm weather returns. On the other end, planting lettuce too early in September when temperatures are still in the 90s will give you poor germination and leggy, bitter seedlings. Watching actual soil and air temperatures matters more than following a rigid calendar date.
Warm-Season Crops and Their Spring Window
Tomatoes, peppers, squash, cucumbers, beans, corn, eggplant, and watermelon all need warm soil and warm air but have an upper limit where they start to suffer. In North Florida, these go in around March once the last frost risk fades. In Central Florida, February through March is the sweet spot. South Florida gardeners often plant warm-season crops as early as January or February, since hard freezes are rare south of Lake Okeechobee.
Spring planting in Florida has a deadline that does not exist up north. You are racing against summer heat rather than against fall frost. Tomatoes, for example, need to set fruit before sustained daytime highs above about 90°F arrive, because heat damages pollen and wrecks fruit set. If you put tomato transplants in the ground too late, say April in Central Florida, you may get vigorous vine growth and plenty of flowers but very few actual tomatoes before summer shuts things down.
What Heat Actually Does to Your Plants
Understanding why summer is so brutal for Florida vegetable gardens helps you plan around it. The problem is not just that plants wilt or look stressed. At a basic level, high temperatures disrupt reproduction in many vegetable crops. Research on tomatoes shows this clearly. When plants are grown under sustained high temperatures with daytime highs around 90°F and nights around 79°F, pollen production drops and the pollen that does form is less viable.2PubMed Central. The effect of heat stress on tomato pollen characteristics is associated with changes in carbohydrate concentration in the developing anthers The sugar and starch metabolism inside the flower’s anthers gets thrown off, leaving pollen grains without the energy reserves they need to germinate and grow.
The practical result is stark. Under favorable temperatures, even so-called heat-sensitive tomato varieties can set fruit on roughly 40 to 55 percent of their flowers, while heat-tolerant types manage 45 to over 90 percent. Crank up the heat, and sensitive varieties produce zero fruit. Even heat-tolerant varieties see fruit set drop to somewhere between 5 and 65 percent, depending on the specific variety.3HortScience. POLLEN VIABILITY AND FRUIT SET OF HEAT-TOLERANT AND SENSITIVE TOMATO GENOTYPES UNDER OPTIMUM AND HIGH-TEMPERATURE REGIMES This is why a tomato plant that was loaded with green fruit in May can sit in your garden all June and July producing nothing but flowers that drop without setting.
Peppers, beans, and squash face similar, though sometimes less dramatic, heat-related fertility problems. The broad lesson is that Florida’s summer heat is not just uncomfortable for plants; it is biologically incompatible with fruit production in many standard vegetable varieties.
The North-to-South Divide
Florida spans USDA hardiness zones 8b through 11a, which is a huge range. The Panhandle and parts of North Florida occasionally see hard freezes with temperatures in the low 20s°F. South Florida almost never drops below 40°F. This means the planting calendar shifts by weeks or even months depending on where you are.
A rough guide to keep in mind:
- North Florida (Tallahassee to Jacksonville): Cool-season crops go in September through February. Warm-season crops go in March through early April. Summer is largely an off-season, though you can grow sweet potatoes, Southern peas, and okra.
- Central Florida (Orlando, Tampa, Gainesville): Cool-season planting starts in late September or October and runs through February. Warm-season crops go in from February through March. Summer is tough but slightly more workable than up north.
- South Florida (Miami, Fort Lauderdale, Naples): Cool-season crops plant from October through January. Warm-season crops can go in as early as late January or February. The “off-season” is shorter but summer still presents heat, disease, and pest challenges.
These windows are guidelines, not laws. Microclimates matter. A garden sheltered by a south-facing wall in Jacksonville may stay warmer than an exposed field twenty miles inland. Coastal areas often stay a few degrees warmer in winter and cooler in summer than inland locations at the same latitude.
What You Can Actually Grow in Summer
Summer in Florida is not a total write-off, but your options narrow dramatically. The vegetables that handle sustained heat and humidity include sweet potatoes, okra, Southern peas (black-eyed peas, crowder peas), Malabar spinach, seminole pumpkin, and certain heat-tolerant pepper varieties. Cherry and grape tomato types sometimes continue producing when larger-fruited varieties have given up, though even they slow down considerably. Herbs like basil and rosemary can power through, though basil bolts quickly and needs frequent replanting.
Many Florida gardeners treat summer as a rest period for the garden or, better yet, a chance to improve the soil for the fall season. Planting a summer cover crop serves double duty: it protects bare soil from Florida’s intense summer rains and can help manage pest populations.
Summer Cover Crops and Soil Health
What you grow when you are not growing vegetables matters a lot in Florida. Sandy Florida soils lose nutrients fast, especially during summer when afternoon thunderstorms can dump inches of rain in an hour. Leaving soil bare means erosion, nutrient runoff, and an open invitation for weeds.
Cover crops planted in summer can suppress weeds and, depending on the species, help manage soil-dwelling pests like root-knot nematodes. Field trials in north-central Florida found that sunn hemp, a tropical legume, suppressed root-knot nematode populations in some cropping systems. However, not all cover crops help equally. Sorghum-sudangrass and pearl millet sometimes increased root-knot nematode levels, and sorghum-sudangrass also boosted populations of ring and lesion nematodes.4Nematropica. EFFECT OF CROPPING SYSTEM COMPLEXITY ON PLANT-PARASITIC NEMATODES ASSOCIATED WITH ORGANICALLY GROWN VEGETABLES IN FLORIDA Cover crops that increased nematode numbers when planted alone generally produced the same result when mixed with another species, so blending a problematic grass with a beneficial legume does not reliably cancel out the effect.
More recent research in Florida organic systems found that cover crop species mixtures with three or five species helped manage summer weeds and root-knot nematodes in some years, though sorghum-sudangrass monocultures again increased sting nematode populations. The mixtures that included buckwheat also benefited pollinators since buckwheat was the only cover crop that flowered during the summer trial.5Frontiers in Sustainable Food Systems. Different cover crops have a limited impact on marketable yields and biogeochemical cycling but secondary effects on pollinators and plant-parasitic nematodes in Florida organic vegetable systems Overall, cover crops had limited direct effects on the yield of subsequent vegetable crops but delivered meaningful secondary benefits for pest management and pollinator habitat.
The practical takeaway: if you are choosing a summer cover crop in Florida, sunn hemp is a safer bet for nematode management than sorghum-sudangrass. If you want to support pollinators while your garden rests, include buckwheat or another flowering species in the mix.
Florida’s Sandy Soil and Nutrient Leaching
Timing your planting is only half the battle. Florida’s predominant sandy soils create a nutrient management challenge that gardeners from clay-heavy regions do not expect. Sand holds very little water and even less fertilizer. When you apply a standard dose of nitrogen, potassium, or phosphorus to sandy soil and then a heavy rain hits, a large portion of those nutrients washes straight through the root zone before plants can use them.
Research on sandy soils with very low clay content found that nutrient leaching from a single fertilizer application was significant under simulated rainfall, but splitting the same total amount of fertilizer into three to five smaller applications reduced leaching to negligible levels.6Nutrient Cycling in Agroecosystems. Fertiliser strategies for improved nutrient use efficiency on sandy soils in high rainfall regimes This is directly relevant to Florida home gardeners. Rather than dumping a big dose of fertilizer at planting time, you are better off applying smaller amounts every few weeks throughout the growing season. This approach keeps nutrients available in the root zone and reduces runoff into Florida’s sensitive waterways.
The leaching problem is worst during summer’s daily downpours, which is another reason summer gardening is harder: even if your crop tolerates the heat, keeping it fed requires more frequent, lighter fertilizer applications than you might be used to.
Disease Pressure and Moisture
Florida’s combination of warmth and moisture creates an environment where certain soil-borne plant diseases thrive. Phytophthora blight, caused by the water mold Phytophthora capsici, is a serious threat to peppers, squash, watermelon, and tomatoes in the state. Research on Florida vegetable fields found that Phytophthora capsici can survive in moist soil for nearly two months, with recovery of live propagules lasting up to 57 days at full soil moisture capacity. In standing water, such as the runoff that collects in low spots or drainage ditches, the pathogen survived for 63 days.7Annals of Applied Biology. Survival and recovery of Phytophthora capsici and oomycetes in tailwater and soil from vegetable fields in Florida
For home gardeners, this means that planting susceptible crops in areas with poor drainage, or in beds where an infected crop recently grew, is risky. Raised beds help because they improve drainage and reduce the amount of time soil stays saturated. Rotating crop families between beds and avoiding planting peppers or squash in the same spot in back-to-back seasons reduces the chance of a devastating Phytophthora outbreak. If you irrigate with overhead sprinklers, switching to drip irrigation cuts the amount of moisture sitting on leaves and soil surface, which slows disease spread.
Frost Protection in North and Central Florida
While heat dominates most discussions of Florida gardening, frost is a real threat to warm-season crops if you push your planting dates early. North Florida typically sees its last frost between mid-February and mid-March. Central Florida’s last frost is usually in January or February, though cold snaps can arrive later in unusual years. South Florida rarely needs to worry about frost at all.
If you transplant tomatoes or peppers in February in North Florida to get a head start, you are gambling. A single night below 32°F can kill unprotected transplants. Row covers, water-filled plant protectors, and cold frames can buy you a few degrees of protection, which is often enough to survive a light frost. But if a hard freeze is forecast, moving container plants indoors or covering in-ground plants with heavy fabric and adding a heat source underneath is the safer play.
The flip side of frost protection is knowing when to stop planting cool-season crops. Lettuce, spinach, and peas planted too late in spring will bolt as soon as temperatures climb. In Central Florida, most cool-season crops should be in the ground by February at the latest. In North Florida, you can push into early March for fast-maturing crops like radishes and lettuce, but slower growers like broccoli need to be well established by then.
Seed Germination and Soil Temperature
Calendar dates are a rough guide, but what actually triggers seed germination is soil temperature. Each vegetable species has a minimum soil temperature below which seeds will not germinate, and a range where germination happens fastest. Soil temperature in Florida can vary wildly depending on sun exposure, mulch, irrigation, and whether the bed is raised or in-ground. A raised bed in full sun in February may be 10 or more degrees warmer than a shaded in-ground bed a few feet away.
Research has shown that the germination period for vegetable seeds can be predicted using a heat sum and a minimum temperature threshold, meaning that seeds essentially accumulate warmth over time until they have enough energy to sprout.8Scientia Horticulturae. Some aspects of seed germination in vegetables. II. The effect of temperature fluctuation, depth of sowing, seed size and cultivar, on heat sum and minimum temperature for germination In practical terms, this means that planting seeds into soil that is close to but not quite at the ideal temperature will still produce germination; it will just take longer. If you plant bean seeds into cool soil in early February in Central Florida, they may sit for two or three weeks before sprouting rather than the five to seven days you would see in warm March soil. The risk during that longer wait is that the seeds rot before they germinate, especially in wet conditions.
An inexpensive soil thermometer is one of the best investments a Florida vegetable gardener can make. Check soil temperature at a depth of about four inches in the morning, when it is coolest. For warm-season crops, you generally want to see at least 60 to 65°F before planting seeds directly. For cool-season crops, soil above about 85°F can inhibit germination of lettuce and spinach, which is why early fall planting sometimes fails if you try it before the soil has cooled down from summer.
Choosing Heat-Tolerant Varieties
One way to stretch your growing season in Florida is to choose varieties bred for heat tolerance. This is particularly relevant for tomatoes, where the difference between a heat-sensitive and a heat-tolerant variety can mean the difference between zero fruit and a respectable harvest when temperatures spike. Studies comparing tomato genotypes found that under high temperatures, heat-tolerant varieties still managed fruit set between 45 and 65 percent, while the most heat-sensitive ones set no fruit at all.9HortScience. Pollen Viability and Fruit Set of Tomato Genotypes under Optimumand High-temperature Regimes
For Florida gardens, look for tomato varieties specifically recommended for the Southeast or the tropics. “Solar Fire,” “Florida 91,” “Heat Wave II,” and cherry types like “Sweet 100” tend to handle Florida conditions better than varieties developed for northern climates. The same principle applies to peppers, beans, and cucumbers: varieties selected for tropical or subtropical performance give you a wider and more forgiving planting window.
Seed catalogs and university extension resources are the best places to find variety recommendations tailored to your part of Florida. The University of Florida’s extension service maintains regularly updated lists of suggested varieties for the state, covering everything from tomatoes to tropical root crops.1EDIS. Florida Vegetable Gardening Guide: SP 103/VH021, rev. 10/2015
Fall Planting as the Secret Season
Many new Florida gardeners focus all their energy on spring, since that is when the rest of the country gardens. But fall is arguably Florida’s best vegetable season. Temperatures are dropping rather than rising, which means crops planted in September or October will grow into increasingly favorable conditions rather than racing against worsening heat. Pest pressure from insects and diseases tends to ease as temperatures cool. And the reduction in daily thunderstorms means less disease from splashing water and less nutrient leaching from your sandy beds.
A fall garden in Central or South Florida can produce tomatoes, peppers, squash, and beans through November and December, then transition seamlessly into cool-season crops like lettuce, broccoli, and root vegetables that carry through winter. If you are only going to garden one season in Florida, fall into winter is the one to pick. You will deal with fewer pests, less extreme heat, and lower water bills than a spring garden, and your cool-season crops will reward you with the kind of sweet, crisp produce that only develops under mild temperatures and short days.