May is such an exciting time for gardeners because it’s finally safe to plant what to plant in May after last frost – warm season vegetables and heat-loving plants! I absolutely love this time of year because the soil is warming up, the days are getting longer, and all those tender plants that would have shivered in March are ready to thrive. After years of gardening here in Florida, I’ve learned that timing really matters when it comes to warm season crops. What to Plant in May After Last Frost – Warm Season Vegetables and Heat-loving Plants is a popular choice for gardeners.
The magic happens when nighttime temperatures consistently stay above 50°F and your soil temperature reaches at least 60°F. You can actually test this with a soil thermometer, but honestly, I just stick my finger a few inches into the ground and if it feels warm rather than cool, we’re good to go. Here in Florida, we’re usually ready by early to mid-April, but for most of the country, May is that sweet spot.
Perfect Warm Season Vegetables to Plant in May
Tomatoes are absolutely my number one pick for what to plant in May after last frost. I grow both determinate varieties like ‘Roma’ for sauce making and indeterminate types like ‘Cherokee Purple’ for fresh eating. The key is making sure your soil is really warm because cold soil will stunt their growth for weeks. I always wait until nighttime temps are consistently above 55°F before putting my tomato transplants in the ground.
Peppers are another fantastic choice that really needs that warm soil to get going. I love growing bell peppers, jalapeños, and even some hot varieties like habaneros. They’re actually more heat tolerant than tomatoes once established, which makes them perfect for our hot Florida summers. Plant them about 18 inches apart and they’ll reward you with harvests all season long.
Eggplant is one of those vegetables that people either love or haven’t tried growing themselves. I’m definitely in the love camp! They need warm weather to really take off, so May planting is perfect. The purple varieties are classic, but I’ve had great success with white and even striped types. Just remember they need consistent moisture and really rich soil to produce those gorgeous fruits.
Summer squash like zucchini and yellow crookneck are incredibly productive warm season crops. I plant them from seed directly in the garden because they grow so fast and don’t like their roots disturbed. One plant will feed a family of four all summer, so don’t go overboard unless you want to be giving away bags of squash to your neighbors!
Heat-Loving Herbs and Greens for May Planting
Related article: Chaos Gardening Explained
Basil is hands down my favorite herb to grow in warm weather, and it’s definitely part of what to plant in May after last frost. I grow several varieties including Genovese for pesto, Thai basil for stir-fries, and purple ruffles just because they’re so pretty. The trick with basil is keeping it well-watered but not soggy, and pinching off flower buds to keep the leaves tender and flavorful.
Okra might not be everyone’s favorite vegetable, but it’s absolutely perfect for hot climates. Here in Florida, it grows like crazy once the heat kicks in. The plants get tall and produce beautiful hibiscus-like flowers before forming the edible pods. University of Florida extension recommends varieties like ‘Clemson Spineless’ for beginners.
Heat-tolerant greens like Malabar spinach and amaranth are great alternatives to cool season lettuces that bolt in warm weather. Malabar spinach isn’t actually spinach, but the leaves taste similar and it climbs like a vine, making it perfect for vertical gardening. Amaranth produces both edible leaves and seeds, plus the flowers are absolutely gorgeous.
Swiss chard is surprisingly heat tolerant compared to other leafy greens. I grow the rainbow variety because those colorful stems add so much beauty to the garden. You can harvest the outer leaves continuously while the plant keeps producing new growth from the center. It’s like having a living salad bar right in your backyard!
Warm Season Flowers and Ornamental Plants
Sunflowers are classic warm season flowers that kids especially love to grow. I plant both giant varieties that can reach 10 feet tall and smaller decorative types for cutting. They’re incredibly easy to grow from seed and attract beneficial insects like bees and butterflies to your garden. Just make sure to give the tall varieties plenty of space and maybe some support stakes.
Zinnias are my go-to annual flowers for summer color because they absolutely thrive in heat and humidity. They come in every color except blue and bloom continuously until frost. I direct sow the seeds in May and they’re blooming by July. The butterflies go crazy for them, and they make excellent cut flowers for indoor arrangements.
Marigolds are not only beautiful but they’re also natural pest deterrents. I plant them throughout my vegetable garden because they help repel harmful insects while attracting beneficial ones. The French marigolds are compact and perfect for borders, while African marigolds get much larger and make great background plants.
Cosmos are delicate-looking flowers that are actually quite tough once established. They reseed themselves readily, so you might find volunteer plants popping up in unexpected places next year. I love how they sway in the breeze and attract tons of pollinators. The white and pink varieties are classic, but there are also orange and burgundy types available.
Planting Tips and Care for May Gardens
Soil preparation is absolutely critical for success with warm season vegetables and heat-loving plants. I always work in several inches of compost before planting because these crops are heavy feeders that need rich, well-draining soil. If your soil is clay-heavy like mine was when I first started gardening, adding compost and maybe some perlite will help with drainage and root development.
Mulching becomes super important once the heat really kicks in. I use a 2-3 inch layer of organic mulch like shredded leaves or grass clippings around all my plants. This helps retain moisture, suppress weeds, and keep the soil temperature more consistent. USDA research shows that proper mulching can reduce water needs by up to 50%.
Watering deeply but less frequently encourages strong root development. I prefer to water early in the morning so the plants have time to dry off before evening, which helps prevent fungal diseases. A soaker hose or drip irrigation system is ideal because it delivers water directly to the root zone without wetting the foliage.
Regular feeding keeps warm season crops producing all summer long. I use a balanced organic fertilizer every 4-6 weeks, or I side-dress with compost monthly. Tomatoes and peppers especially benefit from consistent nutrition, and you’ll see the difference in both plant health and fruit production.
May planting sets you up for an amazing summer harvest of what to plant in May after last frost – warm season vegetables and heat-loving plants. The key is being patient with soil temperatures and not rushing things, even if you’re excited to get started. I’ve learned that plants put in warm soil will quickly outgrow those planted too early in cool conditions.
Trust me, there’s nothing quite like walking out to your garden on a summer morning and harvesting fresh tomatoes, peppers, and herbs for breakfast. Take your time with soil prep, choose varieties suited to your climate, and you’ll be rewarded with months of delicious homegrown food!
