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.
Indoors (fresh harvests):
-
Microgreens: peas, broccoli, sunflowers, arugula
-
Sprouts: alfalfa, broccoli, radish, mung
-
Herbs & greens under lights: chives, parsley, mint
Transplants to move outdoors (harden first): pepper, tomato, eggplant, melons, basil, okra — these should go out early May if not already in the ground
Crops that can be directly sown outdoors in May: beans, corn, cucumber, squash, melons, okra, sunflower, basil, dill, sweet potato slips. Succession sow beets, carrots, and radishes early in the month before heat sets in.
Cover crops: buckwheat, cowpeas, sorghum-sudangrass
Note: Warm-season crops should be going directly outdoors now, not starting under lights.
Tip: An Olympia, WA zone 8 is very different from a Jackson, MS zone 8. Consider checking with your state Extension Service office for more specific recommendations and guidelines.
Use your USDA zone as a guide. Microclimates matter — coastal/urban spots run warmer; high elevation runs colder.
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Pumpkin Seeds - Jack O Lantern - Organic
Cucurbita pepo. (105 days) This is a pumpkin with lots of great uses. Jack O'Lantern makes a fantastic carving pumpkin for Halloween of course. This pumpkin also divine in soups,...
Crimson Clover - Organic - Microgreens Seeds
Crimson clover can be used to grow sprouts or microgreens, and is an ideal cover crop. Certified Organic. Trifolium incarnatum. Non-GMO. Sow in fall or late summer as a cover...
Wheat - Hard White (Organic) - Sprouting Seeds
1-2 Days to Harvest. Triticum aestivum. Organic Hard White Wheat Sprouting Seeds. Organic. Non-GMO. Sprouting. Excellent Germination Rate. Hard white wheat berries are excellent for sprouting easily and quickly. They...
Watermelon Seeds - Picnic - Moon & Stars (Organic)
95 Days to maturity. Citrullus lanatus. Organic Moon & Stars Watermelon Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Suitable for growing in garden plots. These medium-sized...
Oat Groats (Organic) - Bulk Grains
Oat groats are oats that have had their outer hull removed. Our oat groats can be used to make oatmeal, ground into oat flour, and are great for long-term food...
Gourds Seeds - Large Mix
100-120 days. Lagenaria sp. Mix of many large type Lagenaria gourds. Approximately 255 seeds/oz.; with sprawling vines, gourds require widespread areas for growth; rows can be planted 2 - 3...
Hibiscus Seeds - Luna Series
70-84 days to maturity. Hibiscus moscheutos. Hibiscus Luna Series Seeds. Non-GMO, F1 hybrid, perennial. Luna Series hibiscus seeds promise robust and long-lasting blooms to your garden when other flowers can...
Tomato Seeds - Paste - Rio Grande
80 Days to maturity (from transplant). Solanum lycoperscium. Rio Grande Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, determinate, paste tomato. Suitable for growing in garden plots, raised beds, and...
Eggplant Seeds - Long Ping Tung
Long Ping Tung Eggplant Seeds originate from Ping Tung, Taiwan. Plants are disease resistant and do well even in heat. Fruits produced are 12-18" long and 1.25" wide. They are...
Bean Seeds - Bush - Black Turtle (Organic)
75-100 Days to maturity. Phaseolus vulgaris. Organic Black Turtle Bean Seeds. Non-GMO, annual, open-pollinated, organic, heirloom, bush, shelling bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Sunflower Seeds - Italian White
90-110 Days to maturity. Helianthus debilis. Italian White Sunflower Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Heirloom. Italian White sunflower seeds grow some of summer's most elegant, classic, and vigorous blooms....
Basil Seeds - Red Rubin
Non-GMO, Open-pollinated Red Rubin Basil Herb Seed from True Leaf Market. Ocimum basilicum x purpurascens. As basil has many different types, Red Rubin Basil is a sweet cultivar and hybrid...
Radish - Red Volcano (Organic) - Sprouting Seeds
5-6 Days to Harvest. Raphanus sativus. Organic Red Volcano Radish Sprouting Seeds. Organic. Non-GMO. Sprouting. High Germination. Fresh, zesty, and spicy non-GMO Organic Red Volcano radish sprouts are a colorful...
Calendula Seeds - Bon Bon Series
91-98 Days to maturity. Calendula officinalis. Bon Bon Series Calendula Seeds. Non-GMO, Ornamental, Annual. Bon Bon Series seeds grow one of the most celebrated, lush, and brilliant blooms of any...
Watermelon Seeds - Icebox - Bush Sugar Baby
75 Days to maturity. Citrullus lanatus. Bush Sugar Baby Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Icebox watermelon. Suitable for growing in garden plots and large containers (minimum...
Radish Seeds - Korean - Cheong Du - Hybrid
60 to 65 days to maturity. Raphanus sativus. Cheong Du Korean Radish Seeds. Hybrid, cool season annual. Cheong Du radishes are a common, popular variety in Korea. Their name means...
Gift Card
Shopping for someone else but not sure what to give them? Give them the gift of choice with a True Leaf Market gift card. Gift cards from True Leaf Market...
Petunia Seeds - Prism Sunshine (pelleted)
98-105 Days to maturity. Petunia x hybrida. Prism Sunshine Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Prism Sunshine petunia seeds are a gorgeous and award-winning compliment to any home...
Celery Microgreens Seeds
Celery Microgreens. Apium graveolens. 21-28 days. Microgreens. Non-GMO. Celery microgreens are a fast, fun way to get the savory and crisp flavor of celery in only a few days rather...
Brown Flax (Organic) - Bulk Grains
Our Organic brown flax seeds (Linum usitatissimum) are perfect for adding into numerous recipes for their myriad of health benefits and ability to add bulk to dishes. They are excellent...
Pepper Seeds - Sweet - Sunbright
75 Days to maturity (from transplant). Capsicum annuum. Sunbright Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, sweet pepper with no heat. 0 Scoville Heat Units. Suitable for growing in garden plots,...
Tomato Seeds - Cherry - Juliet Hybrid
60 Days to maturity (from transplant). Solanum lycoperscium. Juliet Hybrid Tomato Seeds. Non-GMO, AAS Winner, annual, F1 hybrid, indeterminate grape tomato. Suitable for growing in garden plots, raised beds, and...
Fenugreek Seeds
Non-GMO, Open Pollinated. Heirloom Fenugreek Herb Garden Seed from True Leaf Market. Trigonella foenum-graecum. Fenugreek is a warm fast-maturing annual that's been used as an incense dating back to Ancient...
Pumpkin Seeds - Small Sugar - Organic
Cucurbita (95 days) Sometimes called New England Pie Pumpkin. The long time favorite and standard for pies. None grows any sweeter. Fruits small, 6-8 lbs; round, flattened at the ends...
Carrot Seeds - Kuroda Long 8"
The Kuroda Long 8" carrot is a sweet Asian carrot. It is tolerable to multiple climates, and grows best with some shade. Seeds should be planted in fertile loose soil....
Wildflower Seeds - Partial Shade Mix
Partial Shade Mix wildflower seeds grow some of the season's most inspired, classic, and lasting blooms. Partial Shade Wildflower Mix seeds contain a blend of 19 partial-sun varieties of wildflowers...
Lavender Seeds - Munstead
126-140 Days to maturity. Lavender angustifolia. Munstead Lavender Seeds. Heirloom, Non-GMO, Open Pollinated. Perennial. A fragrant robust lavender that, due to its short size and tightly held blooms (about 8...
Bean Seeds - Bush - Masai
47-60 Days to maturity. Phaseolus vulgaris. Masai Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high yielding, heat tolerant, bush, snap, green bean. Suitable for growing in containers, garden plots, raised...
Lettuce Seeds - Crisphead - Webbs Wonderful
Non-GMO Webbs Wonderful Crisphead is an English lettuce that does well in the heat. Very large and robust heads with crumpled leaves, Webbs Wonderful has a fine distinct flavor and...
Bean Seeds - Bush - Provider (Organic)
50-65 Days to maturity. Phaseolus vulgaris. Organic Provider Bush Bean Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, high yielding, heat tolerant, bush, snap, green bean. Suitable for growing in containers, garden...
Turnip Seeds - Seven Top
45-65 days. Brassica rapa. Seven Top Turnip seeds grow into cool season root vegetables that are biennials, fast growing and referred to as "turnip greens." These heirloom seeds come from...
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