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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Cress Seeds - Watercress
Non-GMO, Heirloom Watercress Herb Garden Seed from True Leaf Market. Nasturtium officinale. Watercress, also known as "Yellowcress" is a hardy perennial native to regions in Asia and Europe. This trailing...
Tomato Seeds - Slicing - Beefsteak Indeterminate
90 Days to maturity (from transplant). Solanum lycoperscium. Beefsteak Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. One of...
Cilantro Seeds - Leisure Splits
Non-GMO, Heirloom Leisure Splits Cilantro Herb Garden Seed from True Leaf Market. Coriandrum sativum. Cilantro is native to regions in North Africa and West Asia. Leisure Splits Cilantro, also known...
Pepper Seeds - Sweet - Horizon Orange
75 Days to maturity (from transplant). Capsicum annuum. Horizon Orange Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, sweet-type, with no heat levels. 0 Scoville Heat Units. Suitable for growing in garden...
Pepper Seeds - Sweet - Red Cherry Sweet
85 Days to maturity (from transplant). Capsicum annuum. Red Cherry Sweet Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, drought tolerant, sweet pepper with mild heat levels. 0 to 100 Scoville...
Chives Seeds
Non-GMO, Heirloom Chives Herb Garden Seed from True Leaf Market. Allium schoenoprasum. Chives are native to regions in Asia and Europe. This Chive cultivar is common in the U.S. and...
Pepper Seeds - Sweet - Sunset Italian Mix (Organic)
70-100 Days to maturity (from transplant). Capsicum annuum. Organic Sunset Italian Pepper Mix Pepper Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, sweet pepper with mild heat levels. 0 to 100 Scoville...
Pumpkin Seeds - Jack Be Little
95 days. Cucurbita pepo. Jack Be Little Pumpkin seeds are upright tender annuals and a favorite when it comes to miniature holiday pumpkins. Jack Be Littles produce 3-4" wide and...
Oregano Seeds - Greek
Origanum vulgare hirtum Perennial. Non-GMO, Heirloom Greek Oregano Herb Garden Seed from True Leaf Market. Origanum vulgare hirtum. Greek Oregano is a perennial herb native to regions in the Mediterranean....
Carrot Seeds - Imperator 58
65-80 days. The Imperator 58 carrot is a colorful and crunchy addition to any home garden. Seeds produce nine inch long tapered roots with a bright orange color. Their tops...
Tomato Seeds - Cherry - Sweetie
65-70 Days to maturity (from transplant). Solanum lycoperscium. Sweetie Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Widely considered...
Cucumber Seeds - Marketmore 76 (Organic)
67 days. The Marketmore 76 cucumber is a variety of cucumber that is sweet and tender. The Marketmore 76 is dark green and smooth, and grows to be between eight...
Hydroponic Microgreens Starter Kit
The perfect way to get started growing microgreens indoors or outside! Countertop gardening at its best. Soilless approach for no mess. Complete kit includes: trays, Bamboo growing pads, 6 seed...
Onion - Sprouting Seeds
10-14 Days to Harvest. Allium cepa. Non-GMO Onion Sprouting Seeds. Non-GMO. Sprouting. High Germination. Onion sprout seeds are an easy and delicious way to add some quick, subtle flavor to...
Pepper Seeds - Sweet - Keystone Resistant Giant
70 Days to maturity (from transplant). Capsicum annuum. Keystone Resistant Giant Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, sweet pepper with no heat. 0 Scoville Heat Units. Suitable for growing in...
Zinnia Seeds - Pumila Pompon
50-70 Days to maturity. Zinnia elegans. Pumila Pompon Zinnia Seeds. Non-GMO, organic, annual. This is a great old-fashioned variety that has fully to semi-double flowers. These warm and cheerful flowers...
Basil - Dark Opal - Microgreens Seeds
18-30+ days. This variety of purple basil seeds has a beautiful dark color, earning its name of Dark Opal. They are an ideal heirloom microgreens seed that growing consistently and...
Alfalfa - Cover Crop Seeds
60-70 Days. Medicago sativa. Annual. Non-GMO. Cover Crop. Also known as "lucerne", non-GMO alfalfa is a year-round cover crop, widely grown for its nitrogen-replenishing benefits and fertile, all-natural springtime "green...
Organic Herb Collection - 8 Pack
Organic Herb Seed Collection. 8 Varieties. Annuals and Perennials. Non-GMO. The Organic Herb Seed Collection is handpicked of 8 of the most popular garden and culinary kitchen herbs such as...
Clover - Red (Organic) - Microgreens Seeds
Delicious clover greens go well with virtually any microgreens salad. Better if harvested before 10 days. Taste becomes bitter as the crop ages. Requires extra rinsing to remove the seed...
Oats - Whole (Organic) - Grass Seeds
6-10 Days to maturity for juicing. Avena sativa. Organic Whole Oat Grass Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in trays, and the field or garden. This product...
Pepper Seeds - Sweet - Pepperoncini Italian
65-75 Days to maturity (from transplant). Capsicum annuum. Pepperoncini Italian Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, drought tolerant, sweet pepper with mild heat levels. 100 to 500 Scoville Heat...
Alfalfa - Organic - Cover Crop Seeds
60-70 Days. Medicago sativa. Organic. Non-GMO. Cover Crop. Also known as "lucerne", Organic non-GMO alfalfa is a year-round cover crop, widely grown for its nitrogen-replenishing benefits and fertile, all-natural springtime...
Tomato Seeds - Slicing - Red Ponderosa Beefsteak (Organic)
90 Days to maturity (from transplant). Solanum lycopersicum. Organic Red Ponderosa Beefsteak Tomato Seeds. Non-GMO, warm season annual, organic, open-pollinated, heirloom, indeterminate, slicing tomato. Also known as Scarlet Beefsteak, Red...
Kohlrabi Seeds - Early White Vienna
55-70 days. Early White Vienna Kohlrabi Seeds. Brassica oleracea var. gongylodes. Non-GMO. Heirloom. Translated from German "Ëœkohl" meaning cabbage and "Ëœrabi" meaning turnip, the kohlrabi plant is a unique and...
Radish - China Rose (Organic) - Sprouting Seeds
5-6 Days to Harvest. Raphanus sativus. Organic China Rose Radish Sprouting Seeds. Organic. Non-GMO. Sprouting. High Germination. Fresh, zesty, and spicy non-GMO Organic China Rose radish sprouts are a colorful...
Cabbage Seeds - Red Acre (Organic)
90-110 days. Organic Red Acre Cabbage Seeds. Brassica oleracea var. capitata. Non-GMO. Heirloom. Nearly a century old and still one of the most reliable performers in the garden, Red Acre...
Roselle Seeds - Asian Sour Leaf (Hibiscus)
70-90 day maturity. Hibiscus sabdariffa. Asian Sour Leaf Roselle Seeds. Non-GMO, Cool-season perennial heirloom. This unique perennial can be grown as an annual in areas where it will not survive...
Hyssop Seeds
Non-GMO, Heirloom Hyssop Herb Garden Seed from True Leaf Market. Hyssopus officinalis. Hyssop is a flowering perennial herb native to regions in the Middle East. Shrub-like common Hyssop plants are...
Okra Seeds - Clemson Spineless (Organic)
(58 days) I'm sure you heard Grandpa or Grandma talk about Clemson Spineless if you live down South. Well, this is an improvement on that same tasty okra. Clemson Spineless,...
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