The summers just seem to be getting hotter. If you live in an area with hot summers, you might be wondering what you can grow successfully during these months.

Heat Tolerant Seeds

106 products

    The summers just seem to be getting hotter. If you live in an area with hot summers, you might be wondering what you can grow successfully during these months. I have certainly planted a lovely patch of leafy greens and herbs just to have them bolt and rush into flowering before I could get my harvest. I hope that you can avoid our past mistakes by choosing the right plants for your climate.

    Under heat tolerant we have tried to find plants that will grow in the South Texas heat. We are experimenting with many this year (2025) and will post our results on the blog.

    Generally when the temps get above 85 most plants tend to bolt and go to seed.

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    106 products
    A cluster of red, green, and yellow cherry tomatoes on the vine amidst green foliage.
    Tomato Cherry Indeterminate Supersweet 25 Non-GMO, Hybrid Seeds
    David's Garden Seeds®
    Sale
    A vibrant array of Zinnia 'California Giants' flowers, showcasing a variety of colors including pink, purple, red, orange, white, and yellow.
    Flower Zinnia Mixed Color California Giants 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A close-up of an okra plant with a ripe pod and a white flower, indicating the organic and heirloom nature of the seeds.
    Okra Clemson Spineless Perfection 4 Sizes Available
    David's Garden Seeds®
    Baskets filled with bright orange cherry tomatoes on a wooden surface.
    Tomato Cherry Indeterminate Sun Gold 25 Non-GMO, Hybrid Seeds
    David's Garden Seeds®
    A close-up of fresh Southern Pea Bush Pinkeye Purplehull seeds, showing the cream-colored seeds with purple or pink eyes, and green pods with purple markings.
    Southern Pea Bush Pinkeye Purplehull BVR 4 Sizes Available
    David's Garden Seeds®
    A close-up image of the Flower Native Texas Salvia Sage Scarlet with vibrant red tubular flowers and green leaves.
    Flower Native Texas Salvia Sage Scarlet 200 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Assorted cherry tomatoes in a woven basket on a wooden surface with green onions in the background.
    Tomato Cherry Rainbow Mix Determinate & Indeterminate - 25 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Tomato Beefsteak Determinate Tycoon
    Tomato Beefsteak Determinate Tycoon 10 Non-GMO, Hybrid Seeds
    David's Garden Seeds®
    Green squash plants with unripe fruits visible, growing in the garden.
    Squash Summer Tatume - 25 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A close-up of fresh green okra pods.
    Okra Emerald 4 Sizes Available
    David's Garden Seeds®
    A vibrant bouquet of Zinnia flowers in mixed colors including red, white, yellow, and pink.
    Flower Zinnia Mixed Color Pumilia Cut & Come Again - 200 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A cluster of long, red, bean-like vines with green leaves, likely in their mature stage before harvest.
    Bean Pole Yard Long Red Noodle (Red) 4 Sizes Available
    David's Garden Seeds®
    A group of Zinnia Bi-Color Mix flowers with salmon pink petals and a dark eye in the center, fully-double, semi-double, and approximately 20% single flowers.
    Flower Zinnia Bi-Color Mix Zinderella Peach 25 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A person holding a bouquet of salmon-colored Zinnia Oklahoma flowers.
    Flower Zinnia Oklahoma Salmon 50 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A fresh romaine lettuce with bright green leaves and a heavy central head, planted in soil.
    Lettuce Romaine Jericho 50 Non-GMO, Organic, Heirloom Seeds
    David's Garden Seeds®
    Grow a taste of Texas with Okra Texas Hill Country Red! These true heirloom seeds produce 4-6 ft plants bearing 3 inch bronze red fruits full of authentic okra flavor. Harvest in 70 days with an 80%+ germination rate. Our sustainable Non-GMO seeds come in environmentally friendly, reusable packaging.
    Okra Texas Hill Country Red 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Cluster of red yarrow flowers with yellow centers
    Flower Achillea Yarrow Red 200 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A fresh Lettuce Summer Crisp Cherokee with dark red leaves, grown in soil.
    Lettuce Summer Crisp Cherokee 50 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Red Burgundy Okra is as attractive as it is delicious. Another fine okra developed at Clemson University, this variety took home All-America top accolades when it was introduced in the late 1980's. Pods grow up to an impressive 8 inches long. Use Red Burgundy okra in soups, stews, and gumbos. Harvest in about 60 days. Germination rate about 80% or better.
    Okra Red Burgundy 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Okra plant with long green pods, showing the dwarf nature and green leaves.
    Okra Dwarf Long Green Pod 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A cluster of long, slender green okra pods on a wooden surface, with a few tomatoes visible to the side.
    Okra Cowhorn 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A photo showing a healthy patch of Summer Crisp lettuce with dense, green, wavy leaves.
    Lettuce Summer Crisp Muir 50 Non-GMO, Organic, Open Pollinated Seeds
    David's Garden Seeds®
    flower zinnia oklahoma white
    Flower Zinnia Oklahoma White 50 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A garden bed with a variety of Zinnia flowers in bloom, showcasing colors such as pink, purple, red, orange, white, and yellow.
    Flower Zinnia Mixed Color Cactus Mix 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A bunch of white icicle radishes with green stems and leaves, and white roots.
    Radish White Icicle 200 Non-GMO, Heirlooms Seeds
    David's Garden Seeds®
    Green plants with long, thin pods hanging from them.
    Southern Pea Bush Zipper Cream 4 Sizes Available
    David's Garden Seeds®
    A bouquet of pink Zinnia Oklahoma flowers with double and semi-double petals.
    Flower Zinnia Oklahoma Pink 50 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Field of large, mature lettuce plants with thick, vibrant green leaves growing in soil.
    Lettuce Summer Crisp Nevada 50 Non-GMO, Open Pollinated Seeds
    David's Garden Seeds®
    Close-up image of zinnia flowers with a lime green center and blush pink petals.
    Flower Zinnia Queeny Lime with Blush 25 Non-GMO, Open Pollinated Seeds
    David's Garden Seeds®
    A close-up image of a red Zinnia flower with a visible yellow center.
    Flower Zinnia Solid Color Cherry Queen 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Close-up of green leaves on a Moringa tree.
    Herb Moringa 10 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A person holding a bouquet of vibrant Zinnia Queeny Formula flowers with apricot, rose, lime, peach, orange, and lemon colors.
    Flower Zinnia Queeny Formula Mix 25 Non-GMO, Open Pollinated Seeds
    David's Garden Seeds®
    A favorite of Southern gardeners! A Campbell Soup Co. variety from 1950. High quality and early 5 to 6 foot high plants produce heavy yields of tasty 6 to 8 inch spineless, dark green, tapered round pods. Best to harvest when 3 to 4 inches long for best taste and tenderness. Thrives in HOT temperatures! Excellent variety for soups, stews, gumbos, fried, boiling, canning and freezing. Harvest in about 62 days. Germination rate about 80% or better.
    Okra Emerald Green Velvet 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Baskets of Southern Pea Bush Mississippi Purple seeds with reddish-purple pods at the green shell stage.
    Southern Pea Bush Mississippi Purple 100 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Close-up of white Yarrow flowers with green foliage in the background.
    Flower Achillea Yarrow White 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A close-up image of a chartreuse green Zinnia flower with a focus on its petals and center.
    Flower Zinnia Solid Color Envy 200 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Close-up image of a bright yellow Zinnia 'Canary Bird' flower with a green background.
    Flower Zinnia Solid Color Canary Bird - 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    Close-up image of a purple Zinnia flower with a visible yellow center.
    Flower Zinnia Solid Color Purple Prince 500 Non-GMO, Heirloom Seeds
    David's Garden Seeds®
    A fresh head of lettuce with slightly puckered, red-tinged leaves growing in soil.
    Lettuce Summer Crisp Magenta - 50 Non-GMO, Open Pollinated Seeds
    David's Garden Seeds®
    Bouquet of red flowers held by a person against a light blue background
    Flower Zinnia Oklahoma Scarlet 50 Non-GMO, Heirloom Seeds
    David's Garden Seeds®