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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Cabbage Seeds - Charleston Wakefield
Brassica oleracea (70-85 days) The result of a selection from Early Jersey Wakefield made on Long Island. Sold to the F. W. Bolgiano Seed Co. in 1880. Charleston Wakefield produces...
Beet Seeds - Early Wonder - Organic
(33 days for greens and 60 days for beets) Organic Early Wonder came into being sometime around 1911. This is truly one of the best beet varieties for greens. Whereas...
Lettuce Seeds - Parris Island Cos - Organic
Lactuca sativa. (68 days) Parris Island was developed by the USDA and Clemson in the early 1950s. Named for Parris Island off the coast of South Carolina. Organic Parris Island...
Tomato Seeds - Slicing - Black From Tula
75-85 Days to maturity (from transplant). Solanum lycopersicum. Variety name Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Produces...
Pumpkin Seeds - Montana Jack
Cucurbita pepo (90 days) Montana Jack was created by famed plant breeder John Navazio. This pumpkin was selected by John to be an early maturing variety making it great for...
Cucumber Seeds - Summer Top - Hybrid
55-70 Days to maturity. Cucumis sativus ‘Summer Top’. Summer Top Cucumber Seeds. Warm-season annual hybrid.This excellent burpless hybrid cucumber is easy to grow and delivers a large yield of top-grade...
Pumpkin Seeds - Wolf
Non-GMO Wolf Pumpkins are ready in 120 Days. Wolf pumpkin produces the most incredible handle you have ever seen. Its 15 to 25 lb. round to oblate-shaped fruit has a...
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...
Pea Seeds - Snow - Oregon Sugar Pod II (Organic)
60-70 Days to maturity. Pisum sativum. Oregon Sugar Pod II Pea Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant...
Carrot Seeds - Autumn King / Flakkee
The Autumn King/Flakkee carrot is a sweet breed that grows up to 2 ½" wide and 12" long with tops that can reach 16" tall. It is tolerant to the...
Radish, Daikon (Organic) - Vegetable Seeds
60-70 days. Raphanus sativus var. longipinnatus Organic Daikon radish is an upright annual root legume and cool season crop. Select a Different Use for This Seed: Sprouting Growing Organic Radish...
Carrot Seeds - Yellow
65-80 days. The Yellow carrot appears to be a classic carrot in its shape but not in its color. Roots are a beautiful golden shade, and they grow to be...
Chard Seeds - Fordhook Giant - Organic
Beta vulgaris. (50-60 days) Introduced in the 1750s, a very popular heirloom chard has been around longer than granny. Fordhook giant chard is a vigorous variety that is noted for...
Tomato Seeds - Cherry - Baxter's Early Bush
72 Days to maturity (from transplant). Solanum lycoperscium.Tomato - Baxters Early Bush Cherry Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, cherry tomato. Suitable for growing in garden plots, raised beds,...
Tomato Seeds - Slicing - Mountain Pride Hybrid
70 Days to maturity (from transplant). Solanum lycoperscium. Mountain Pride Hybrid Tomato Seeds. Non-GMO, annual, hybrid, determinate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant...
Chinese Celery Seeds - Light Green
50-60 Days to Maturity. 30 days for microgreens. Apium graveolens var. secalinum. Light Green Chinese Celery Seeds. Non-GMO Heirloom. Similar to other varieties of Chinese celery, the light green variety...
Tomato Seeds - Slicing - Coustralee
85 Days to maturity (from transplant). Solanum lycopersicum. Coustralee Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, humidity tolerant, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Squash Seeds - Winter - Marina Di Chioggia
95 Days to maturity. Cucurbita maxima. Marina Di Chioggia Squash Seeds. Non-GMO, heirloom, open-pollinated. Suitable for growing in fields, garden plots, raised beds, and greenhouses. Tolerant of powdery mildew. Known...
Cucumber Seeds - Sumter (Organic)
50 Days to maturity. Cucumis sativus. Organic Sumter Cucumber Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, monoecious, pickling cucumber. Suitable for growing in fields, containers (with support), garden plots, raised beds,...
Corn Seeds - Dent - Lancaster Sure Crop
115 Days to maturity. Zea mays. Lancaster Sure Crop Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Dent Corn. Lancaster Sure Crop was developed by Issac Hershey (and family). Hershey was a...
Chinese Cabbage Seeds - Beka Santoh
Chinese Cabbage Seeds - Beka Santoh. Heirloom, Non-GMO. Brassica rapa Pekinensis group. 25-40 days. Cool season annual. This vigorous loose head variety is grown throughout Japan. The leaves are light...
Eggplant Seeds - Black Shine - Hybrid
65 days maturity after transplanting. Solanum melongena ’Black Shine’. Black Shine Eggplant Seeds. Non-GMO, warm-season, annual, hybrid. This Japanese hybrid eggplant has long fruit with black skin and a purple...
Squash Seeds - Winter - Pink Banana Jumbo (Organic)
Organic Pink Banana Winter Squash is excellent for storing and is ready in 115 days. Recommended by OSU, Mexican Banana Squash produces pink-orange skin with sweet yellow-orange, fine-grained flesh. Plymouth...
Tomato Seeds - Slicing - Best Boy Bush Hybrid
75 Days to maturity (from transplant). Solanum lycopersicum. Best Boy Bush Hybrid Tomato Seeds. Non-GMO, annual, F1 hybrid, determinate, slicing tomato. Suitable for growing in garden plots, raised beds, greenhouses,...
Pumpkin Seeds - Lil Pump-ke-mon (Treated)
90-100 Days to maturity. Cucurbita pepo. Lil Pump-ke-mon Pumpkin Seeds. Non-GMO, Annual, Hybrid. This compact vine produces beautiful show-stopping 1-2 lb small pumpkins. Their white skin is highlighted with medium...
Tomato Seeds - Cherry - Sugary Hybrid
60-65 Days to maturity (from transplant). Solanum lycopersicum. Sugary Hybrid Tomato Seeds. Non-GMO, annual, hybrid, 2005 AAS winner, determinate cherry tomato. Suitable for growing in garden plots, raised beds, and...
Gourd Seeds - Bitter Tai Guo Hybrid
50-55 days maturity from Transplanting. Momordica charantia ’Tai Guo’. Tai Guo Bitter Gourd Seeds. Non-GMO, warm-season, annual, hybrid. The Tai Guo gourd is a classic bitter gourd popular in Chinese...
Squash Seeds - Winter - Tahitian (Organic)
80-120 Days to maturity. Cucurbita moschata. Tahitian (Organic) winter squash seeds. Non-GMO, annual, perennial, organic, hybrid, open-pollinated, heirloom, AAS winner. Suitable for growing in fields, containers, garden plots, raised beds,...
Tomato Seeds - Salad - Green Zebra
75-90 Days to maturity (from transplant). Solanum lycoperscium. Green Zebra Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, indeterminate, salad tomato. Suitable for growing in garden plots, raised beds, and...
Pepper Seeds - Hot - Biquinho Red
90-95 Days to maturity (from transplant). Capsicum chinense. Biquinho Red Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high yielding, hot-type pepper with mild heat levels. 500 to 1,000 Scoville Heat Units....
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