May is the month when the gardening season shifts into high gear across most of the country. In cold-winter zones, the last frost is finally behind us, and it's time to get warm-season crops in the ground. In mild-winter zones, the garden is already humming, and the focus turns to keeping up with rapid spring growth. And in the warmest zones, the race is on to get heat-lovers established before summer temperatures take over. Whatever your zone, May is a month of momentum.
Zones 1-7a: May is the main planting kickoff in cold-winter zones, when gardens finally move from starts and prep into full outdoor action. Early May often still favors hardy transplants and direct-sown cool-season crops, while mid-to-late May is when many areas can safely set out warm-season plants as frost risk drops. Keep hardening off seedlings, use row cover if nights run cold, and focus on steady watering and early weed control so young plants establish quickly.
Zones 7b-9a: May is prime warm-season planting time in mild-winter zones, with soil temperatures rising and growth accelerating. This is the month to get main-season crops established outdoors, keep up with succession sowing, and set up supports before vines and tall plants take off. Watch moisture as days warm, mulch to hold soil moisture, and keep an eye out for the first big flush of pests as the garden hits its stride.
Zones 9b-12: May marks the shift into early summer conditions in the warm-winter zones, and gardens respond fast with rapid growth. Warm-season crops should be planted and growing strongly now, and succession sowing keeps harvests coming even as temperatures climb. Stay ahead of heat stress by mulching, watering consistently, and planting in the coolest part of the day - and in the hottest areas, begin planning for shade cloth and other summer protection.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Squash Seeds - Dark Green Zucchini
Cucurbita pepo (45-65 days) Dark Green Zucchini is an early vigorous bush zucchini with straight, smooth, dark-green mottled fruits. Tastiest at 6-8" with pale greenish-white, firm flesh. Dark Green zucchini...
Squash Seeds - Summer - Scallop Jaune et Verte
50-55 days to maturity. Cucurbita pepo. Scallop Jaune et Verte Summer Squash Seeds. Non-GMO, heirloom, open-pollinated, warm-season annual. Suitable for fields, containers, raised beds, and garden plots. Produces unique, scalloped,...
Squash Seeds - Summer - Amberpic Hybrid
42 days to maturity. Cucurbita pepo. Amberpic Hybrid Summer Squash Seeds. Non-GMO, annual, hybrid. This is suitable for fields, containers, garden plots, raised beds, and greenhouses. Early straightneck that sets...
Squash Seeds - Summer - Trieste White Zucchini
Trieste White Zucchini Squash produces short fruits that are very pale green in color, and are tender and delicious. Non- GMO Half Long White Zucchini are early producers, produce on...
Squash Seeds - Summer - 49er F1
49er F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 50 days to maturity. Marketable as a baby squash or full-size fruit, 49er F1 is a delicious golden yellow...
Squash Seeds - Summer - Golden Zucchini (Organic)
50 days to maturity. Cucurbita pepo. Organic Golden Zucchini Summer Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, raised beds, and containers. Eye-catching golden fruits...
Squash Seeds - Summer - Genovese Zucchini
Italian Squash, Genovese. 50-60 days. Cucurbita pepo. AKA: Zucchini Genovese. Squashes started showing up in Italian kitchens as early as 1600, the "Zucchini" variety probably originated around 1850. 250 seeds/ounce....
Squash Seeds - Summer - Lebanese White Bush
Lebanese White Bush Summer Squash Seeds. 45 Days to maturity. Non-GMO, open pollinated, heirloom seeds. Cucurbita pepo. AKA: Lebanese Squash. Though not a high producer, Lebanese White Squash is delicious...
Squash Seeds - Summer - Emperor's Jade Hybrid
50-60 Days to maturity. Cucurbita pepo. Emperor's Jade Hybrid Squash Seeds. Non-GMO, annual, F1 Hybrid. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. This vigorous hybrid...
Squash Seeds - Summer - Diamant F1 Zucchini
Diamant F1 Hybrid Zucchini Squash Seeds. 50 Days. Non-GMO, F1 Hybrid, Summer Squash. Dark Green Zucchinis with slight ribbing, about 8 inches in length. Great yields make this an excellent...
Squash Seeds - Summer - Summerpac F1
Summerpac F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 47 days to maturity. A Hybrid crookneck which is very smooth with no warts. Approximately 250 Seeds / Ounce....
Squash Seeds - Summer - Clarinette F1
Clarinette F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 45 days to maturity. Clarinette F1 is a high yielding pale green to white, bulbous squash. About 250 Seeds...
Squash Seeds - Summer - Moonbeam F1
Moonbeam F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 45 days to maturity. This heavy yielding variety produces white pie shaped fruits with scalloped edges. ~ 250 Seeds...
Squash Seeds - Summer - Ronde De Nice (Organic)
50-60 Days to maturity. Cucurbita pepo. Organic Ronde De Nice Squash Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Has...
Squash Seeds - Summer - Peter Pan F1
Peter Pan F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 50 days to maturity. Can be grown in containers. A miniature patty pan type that is meatier. Approx....
Squash Seeds - Summer - Jasper F1
Jasper F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 45 days to maturity. Early maturing. Jasper F1 is grown in a vigorous bush plant and sets a heavy...
Squash Seeds - Summer - Black Jade Hybrid
50-60 Days to maturity. Cucurbita pepo. Black Jade Hybrid Summer Squash Seeds. Non-GMO, annual, F1 hybrid. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant to...
Squash Seeds - Summer - Total Eclipse Hybrid
49 days to maturity. Cucurbita pepo. Total Eclipse Hybrid Summer Squash Seeds. Non-GMO, annual, F1 hybrid. This is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses....
Squash Seeds - Summer - Summer Melody Blend
Summer Melody Blend Summer Squash Seeds. 45 days to maturity. Cucurbita pepo. Open Pollinated, Annual. This component blend of Golden Zucchini Black Beauty Grey Zucchini and White Bush Scallop is...
Squash Seeds - Summer - Ronde de Nice
50-60 Days to maturity. Cucurbita pepo. Ronde De Nice Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Has demonstrated some...
Squash Seeds - Summer - Zucca de Lungo Verde
Italian Summer Squash, Zucca de Lungo Verde. 50-60 days. Cucurbita pepo. Produces dark green squash about 8". It has a very rich flavor and color. Non-GMO, heirloom, premium open pollinated...
Squash Seeds - Summer - Golden Zebra F1
Golden Zebra F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 50 days to maturity. Golden Zebra F1 is long and slender, with excellent flavor. The fruits are golden...
Squash Seeds - Summer - Partial Eclipse F1
Partial Eclipse F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 51 days to maturity. Delicious and beautiful, Summer Squash Partial Eclipse F1 is a lovely white scalloped squash...
Squash Seeds - Summer - Lunar Eclipse F1
Lunar Eclipse F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 40 days to maturity. Approximately 250 Seeds / Ounce. Download Free Vegetable Growing Guide PDF Select a Different...
Squash Seeds - Summer - Green Zebra F1
Green Zebra F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 42 days to maturity. Green Zebra F1 has a bush habitat and good yield. These spineless, light green...
Squash Seeds - Summer - Black Zucchini (Organic)
44-62 Days to maturity. Cucurbita pepo. Organic Black Zucchini Summer Squash Seeds. Non-GMO, warm weather annual, open-pollinated, summer squash. While this variety is named ‘black’, this zucchini actually has a...
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