June is a month of full-throttle gardening across most of the country. Cold-winter zones are finally free of frost and working hard to get warm-season crops in the ground — but June also brings the first quiet signal that fall is not far off, and a few crops need to go indoors now to be ready in time. Mild-winter zones are managing a garden already in high gear, balancing harvests, succession sowing, and the first real heat of the season. And in the warmest zones, the focus shifts decisively toward heat-tolerant crops and keeping the garden productive as temperatures peak. Wherever you garden, June rewards attentiveness.
Cold Winter Zones (3–7): June is the heart of the warm-season planting window. The frost risk is behind you, soils are warming, and this is your window to get tomatoes, peppers, cucumbers, squash, beans, and corn in the ground. At the same time, June is when fall planting quietly begins. Leeks, pansies, and violas all need to be started indoors this month if you want them for a fall harvest or bloom before the October freeze.
Mild Winter Zones (8–9a): By June, gardens in these zones are in full production. Most warm-season crops are in the ground and growing fast. The main jobs this month are watering consistently, mulching to hold moisture and cool the soil, and staying on top of pests. It is still worth succession sowing heat-tolerant crops early in the month, but as temperatures climb, the emphasis shifts from planting to tending and harvesting. Fall planting starts in July and August for these zones — no action needed yet, but a good month to plan.
Warm Winter Zones (9b–12): June marks the start of high summer, and gardening strategies shift accordingly. Heat-tolerant crops like okra, sweet potatoes, cowpeas, and yard-long beans thrive now, while most cool-season crops are long finished. In frost-free areas with reliable summer rainfall — particularly Florida and Hawaii — tropical crops come into their own. Fall planting is still months away, but worth thinking about: in these zones, fall is the prime growing season, and August and September are when the cool-season garden gets rolling again.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Corn Seeds - Dent - Hickory King Yellow
115 Days to maturity. Zea mays. Hickory King Yellow Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Dent Corn. Hickory King Yellow Corn Seeds, originating in Appalachia around the late 1800s. Huge...
Watermelon Seeds - Picnic - Greybelle
80-90 Days to maturity. Citrullus lanatus. Greybelle Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Suitable for growing in garden plots. 15-20 pound round fruits. Greybelle watermelon...
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 - 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 - Winter - Pinata F1 PMT
Pinata F1 PMT Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 85 days to maturity. This winter squash will truly become a fast favorite in your house. Pinata F1...
Melon Seeds - Cantaloupe - Iroquois (Organic)
75-90 Days to maturity. Cucumis melo. Iroquois Organic Cantaloupe Melon Seeds. A non-GMO, annual, organic, open-pollinated, heirloom, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and greenhouses....
Melon Seeds - Late Valencia
100 days. Cucumis melo var. inodorus. Valencia Late Melon Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and greenhouses. Late Valencia is a winter...
Swiss Chard Seeds - Rhubarb - Organic
Organic Rhubarb Swiss Chard Seeds. 50 - 60 days to maturity. Can be grown in containers. Can be grown as microgreens. Beta vulgaris. Heirloom, Non-GMO, Annual. ~ 1,500 Seeds/ounce. Swiss...
Radish Seeds - Everest - Hybrid
Radish Seeds - Everest - Hybrid. Non-GMO. Raphanus sativus. 55 days. Cool season annual. This Chinese daikon radish is very popular in Taiwan and Japan. Its snow white roots are...
Gourd Seeds - Small Warted Mix
60 or more Days to maturity. Cucurbita spp.. Small Warted Mixed Gourd Vegetable Seeds. Non-GMO, annual, open-pollinated ornamental gourds. This is a curated collection of ornamental gourds in different shapes...
Watermelon Seeds - Picnic - Garrisonian
80-90 Days to maturity. Citrullus lanatus. Garrisonian Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Garrisonian Watermelon Seeds from True Leaf Market produce large, oblong watermelon fruits...
Watermelon Seeds - Picnic - Striped Klondike R7
80-90 Days to maturity. Citrullus lanatus. Striped Klondike R7 Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Suitable for growing in garden plots. Klondike R7 watermelon is...
Squash Seeds - Winter - Guatemalan Blue
90 to 110 days to maturity. Cucurbita maxima. Guatemalan Blue Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, raised beds, and containers. Striking blue-skinned...
Melon Seeds - Tendral Verde Tardif
110 Days to maturity. Cucumis melo var. inodorus. Valencia Late Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant specialty Melon. Suitable for growing in garden plots, raised beds, and greenhouses....
Squash Seeds - Winter - Amish Pie (Organic)
100 days to maturity. Cucurbita maxima. Organic Amish Pie Winter Squash Seeds. Non-GMO, annual, heirloom, organic, open-pollinated. This is suitable for growing in fields, containers, garden plots, raised beds, and...
Radish Seeds - Green Stem
8-12 Days to microgreen harvest. Raphanus Raphanistrum Sativus. Green Stem Radish Seeds. Annual, Non-GMO, Open Pollinated, Heirloom. These Green Stem Radishes are specifically intended to be used for sprouting and...
Radish Seeds - Shogoin Globe
70 Days to maturity. Raphanus sativus. Shogoin Globe Radish Seeds. Cool Season Annual, Heirloom. Shogoin Globe radishes are round daikon radishes that grow quite large–up to 7 inches in diameter!...
Bean Seeds - Bush - Doyou Adzuki
80-100 Days to maturity. Vigna angularis. Doyou Adzuki Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, AAS winner, high-yielding, bush, shell, Asian, specialty, sprouting bean. Suitable for growing in containers, garden plots,...
Sunflower Seeds - Pradera Gold (Organic)
75-90 Days to Maturity. Helianthus annuus. Pradera Gold Organic Flower Seeds. Non-GMO, open-pollinated, organic, flower seeds. Annual in zones 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. Deer...
Melon Seeds - Vine Peach
60-90 Days to maturity. Cucumis melo. Vine Peach Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant specialty Melon. Suitable for growing in containers, garden plots, raised beds, and greenhouses. Also...
Parsley Seeds - Garden Blend
70-99 Days to maturity. Petroselinum crispum. Garden Blend Parsley Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Garden Blend Parsley is...
Sunflower Seeds - Starburst
75 Days to maturity. Helianthus annuus. Starburst Sunflower Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Starburst F1 Hybrid is full-faced brown-headed sunflower perfect for gardens filled with sunshine! This pollen-less hybrid...
Melon Seeds - Honeydew - Golden Honeymoon
92 Days to maturity. Cucumis melo. Golden Honeymoon Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Honeydew Melon. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant to...
Squash Seeds - Winter - Cushaw Orange Striped
Cushaw Orange Striped Winter Squash Seeds. 110 days to maturity. Cucurbita mixta. Annual. Heirloom. The cushaw varieties are commonly referred to as both squash and pumpkins. Approximately 175 seeds/ounce. Squash...
Radish Seeds - Relish Cross - Hybrid
60 Days to maturity. Raphanus sativus. Relish Cross Radish Hybrid Seeds. Cool Season Annual. Relish Cross radishes are the best-selling variety in Japan due to their consistent quality, large size,...
Leaf Radish Seeds - Saisai - Hybrid
30 to 40 Days to maturity. Raphanus sativus. Saisai Leaf Radish Hybrid Seeds. Annual. Leaf radishes are perfect for the gardener who wants tender, peppery radish greens that can be...
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...
Swiss Chard Seeds - Yellow - Organic
55 days. Organic Yellow Swiss Chard is a great non-GMO variety for any gardener looking for something exciting to add to the garden. This variety has long bright yellow veins...
Sunflower Seeds - Early Black Heart
55 Days to maturity. Helianthus annuus. Early Black Heart F1 Hybrid Sunflower Seeds: Non-GMO. Ornamental. Annual. Early Black Heart 100% pollen-less single-headed hybrid sunflower. Think of this variety as Zohar’s...
Squash Seeds - Winter - Big Chief Hybrid
110 days to maturity. Cucurbita moschata. Big Chief Hybrid Butternut Winter Squash Seeds. Non-GMO, annual, F1 hybrid. This is suitable for growing in fields, garden plots, raised beds, and containers....
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