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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Cucumber Seeds - Beit Alpha F1 CMR/MMR
52 Days to maturity. Cucumis sativus. Beit Alpha Hybrid CMR/MMR Cucumber Seeds. Non-GMO, annual, F1 hybrid, parthenocarpic and gynoecious, dual-use slicing or pickling cucumber. Suitable for growing in fields, containers...
Pak Choi Seeds - Dwarf White Stem
40-45 Days to maturity. Brassica rapa Chinensis group. Dwarf White Stem, Pak Choi (Bok Choy) Seeds. Non-GMO Annual, Heirloom. This ‘Baby Bok Choy’, is the famous Asian green. It grows...
Cabbage Seeds - Early Jersey Wakefield
Brassica oleracea var. capitata (63 days) Early Jersey Wakefield cabbage forms a compact, somewhat conical head with glaucous-green leaves. Early Jersey Wakfield is a wonderful early heading variety, occupying little...
Basil Seeds - Dwarf Greek
Non-GMO, Open-pollinated, Heirloom Dwarf Greek Basil Herb Seed from True Leaf Market. Ocimum basilicum. As basil has many different varieties, Dwarf Greek Basil Herb is one of the smaller, ancient...
Bean Seeds - Bush - Tenderette Green
50-65 Days to maturity. Phaseolus vulgaris. Tenderette Green Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom snap bush bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses. The...
Gourd Seeds, Bitter - Joy Green - Hybrid
55-65 Days to Maturity (after transplanting). Momordica charantia ’Joy Green’. Joy Green Bitter Gourd Seeds. Non-GMO, warm-season, annual, hybrid. These shiny green fruits grow 10-12 inches long. Joy Green is...
Parsley Seeds - Plain or Single
70-80 Days to maturity. Petroselinum crispum. Plain or Single Parsley Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Plain or Single...
Broccoli Seeds - Chinese Broccoli - Late Jade - Hybrid
60-70 days to maturity. Brassica oleracea var alboglabra ‘Late Jade’. Late Jade Chinese Broccoli Seeds. Non-GMO, Hybrid, Cool-season Annual. Originating in the Mediterranian, Chinese Broccoli was introduced to China in...
Japanese Mugwort - Yomogi
45 Days to maturity. Artemisia princeps. Yomogi Japanese Mugwort Seeds. Non-GMO perennial heirloom. Yomogi, or Japanese Mugwort, is an easy-to-grow perennial herb that grows in almost any condition. It is...
Sunflower - Red Storm - Microgreens Seeds
Red Storm sunflower microgreen seeds grow exotic red sunflower microgreens that boast all the same flavors and simplicity as traditional Black Oil sunflower sprouts. Try red microgreens sunflower shoots alongside...
Lettuce Seeds - Tom Thumb - Organic
Lactuca sativa (50 days) Introduced some time in the 1850s. Small, round head with delicate leaves. About the size of a baseball. Perfect for one-person salad. Can be planted close...
Basil Seeds - Mammoth
60-90 Days to maturity. Ocimum basilicum. Mammoth Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Mammoth basil is a...
Pea - Microgreens Seeds
6-14 Days to maturity. Pisum sativum. Pea Microgreen Seeds. Pea microgreens are grown differently than most other microgreens but are well worth the change of pace. While they are different,...
Bean Seeds - Bush - Topcrop
50-65 Days to maturity. Phaseolus vulgaris. Topcrop Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, AAS winner, high-yielding, bush, snap, green bean. Suitable for growing in containers, garden plots, raised beds,...
Rosemary Seeds (Organic)
120-180 Days to maturity. Salvia rosmarinus. Organic Rosemary Seeds. Non-GMO, organic, open-pollinated, heirloom, perennial herb. Rosemary is a popular culinary aromatic herb that can be grown in garden plots and...
Tobacco Seeds - Florida Sumatra
~55 Days from transplant to maturity. Nicotiana tabacum. Florida Sumatra Tobacco Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant to...
Cauliflower Seeds - Veronica Romanesco Hybrid
77 days. This "Italian" type produces very symmetrical and spiraled, lime green heads with tightly beaded, pointed domes. Useful raw, cooked, or pickled, with a milder, sweeter flavor than standard...
Cucumber Seeds - Bush Crop
55 days. Bush Crop is an excellent variety for small gardens. This plant produces 6 to 8 inch, slightly tapered fruits on a dwarf vine. A very productive plant, Bush...
Celery Seeds - Nan Ling Cutting
Non-GMO Nan Ling Cutting Celery is an Asian celery variety that has a sweet and delicate flavor. Cutting Celery is the familiar flavor in many Chinese dishes. Known for its...
Gourds Seeds - Turks Turban
Non-GMO Turks Turban is ready in 100+ days. Brightly colored ornamental squash has large, flattened fruits measuring 8 to 10 inches across. This gourd is striped with scarlet, white, orange,...
Bean Seeds - Bush - Fordhook 242 Lima
72 Days to maturity. Phaseolus lunatus. Fordhook 242 Bush Lima Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, AAS winner, high-yielding, heat-tolerant, drought-tolerant, bush, shell, lima bean. Suitable for growing in containers,...
Shiso Seeds - Red (Organic)
80-85 Days to maturity. Perilla frutescens. Red Shiso Herb Seeds. Non-GMO, organic, annual. Shiso is grown as an annual herb with a distinct flavor often described by people as similar...
Endive Seeds - Frisee
Frisee endive grows best in cool conditions. The plant grows 8-12" tall and produces delicate frilly leaves of a yellow-green color. They have a slightly bitter but mild taste that...
Cucumber Seeds - Japanese Long
The Japanese Long cucumber plant produces productive yields of 18-20 inches long fruits. Cucumbers are dark green and burpless with few seeds. They are best when harvested prematurely at 12...
Broccoli Seeds - Early Purple Sprouting
Brassica oleracea var. italica (59 days) Purple sprouting broccoli is an old English type broccoli. Early Purple Sprouting Broccoli is not only a colorful addition to salads, but it is...
Artichoke Seeds - Purple Romagna
85-100 days. Cynara scolymus. Purple Romagna Artichoke Seeds. Non-GMO, tender perennial, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, or field production. Purple Romagna is an Italian...
Okra Seeds - Jing Orange
Jing Orange Okra Seeds. 30 to 60 days to maturity. Abelmoschus esculentus. Heirloom, Annual. Jing Orange is an Asian okra, known for it is stunning red-orange color. Approximately 500 seeds/ounce....
Okra Seeds - Emerald
55-70 days. Emerald Okra Seeds - Non-GMO, Abelmoschus esculentus. These heirloom Emerald okra plants are 5-8 feet tall and produce smooth bright green 7" long pods. They were developed and...
Salsify Seeds - Sandwich Island
Sandwich Island Salsify is a root vegetable that you won't find in the grocery store. Also referred to as an oyster plant, it is a plant that tastes like an...
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