Cold Winter Areas
Zones: 1–7a
These zones experience cold winters with extended periods of freezing temperatures. In March, monitor soil conditions, thaw cycles, and late frosts as you prepare for early outdoor sowing. Indoors, this is a busy month for starting cool-season crops and hardy flowers under lights or in a greenhouse so they are ready to transplant as soon as the weather warms.
Indoors (fresh harvests):
- Microgreens: peas, broccoli, sunflowers, arugula.
- Sprouts: alfalfa, broccoli, radish, mung
- Herbs & greens under lights: chives, parsley, mint
Crops to start indoors in good light: bunching onion, eggplant, tomato, pepper, zinnia, basil, Swiss chard, cosmos
Transplants to move outdoors (weather permitting - harden first): Onion, parsley, broccoli, cabbage, kohlrabi, arugula, pansy, viola
Crops that can be directly sown outdoors in March (assume intermittent frosts; a low tunnel or row cover makes most of these reliable): pak choi, cabbage, kale, mustard, fava bean, pea, turnip, parsnip, sweet pea
Cover crops: winter rye, fava bean, hairy vetch, red or white clover, and cover crop mixes.
Tip: This zone group covers a lot of territory. Nothing takes the place of talking with experienced gardeners in your area and, of course, watching the weather closely.
Use your USDA zone as a guide. Microclimates matter—coastal/urban spots run warmer; high elevation runs colder. 7b pockets can follow “Mild” recommendations with protection.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Petunia Seeds - Daddy Series (Pelleted)
98-105 days. Daddy Series petunia seeds grow an adorable, compact, and vibrant addition to any home, office, or garden. Daddy Series petunias are durable and easy to grow from seed,...
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...
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...
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...
12 Variety Pack Microgreens Sampler
An assortment of popular, exotic, and colorful microgreens from around the world. Includes 1 oz each of: broccoli, purple radish, spicy salad mix, beet, nasturtium, cilantro, garden cress, sunflower, pak...
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...
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...
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...
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,...
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...
Thai Basil Seeds - Siam Queen
Non-GMO, Heirloom Siam Queen Thai Basil Herb Seed from True Leaf Market. Ocimum basilicum. As basil has many different types, Siam Queen Thai Basil is a sweet cultivar that originated...
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...
Corn Seeds - Sweet - (su) Early Sunglow Hybrid
62 Days to maturity. Zea mays. Early Sunglow Hybrid Corn Seeds. Non-GMO, annual, hybrid, Sweet Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and drought-prone...
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...
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...
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...
Bloom Master Hanging Baskets
These Bloom Master Hanging Baskets are light-wight and durable. They will last several years and are great for both residential and commercial plantings. Our large baskets are ideal for lining...
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...
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...
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...
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...
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...
Soybean - Yellow (Organic) - Sprouting Seeds
2-5 Days to Harvest. Glycine max L. Merr.. Organic Yellow Soybean Sprouting Seeds. Organic. Non-GMO. Sprouting. High Germination. Non-GMO Organic yellow soybean seeds sprout one of the healthiest, tastiest, and...
Arugula Seeds - Astro - Microgreens Seeds
4-5 days. Astro Arugula grows quickly into a microgreen that is full of flavor and spice. Arugula is a fast-growing microgreen seed in general, and Astro Arugula is no different....
Sweet Marjoram Seeds
70 days. Annual. Non-GMO, Heirloom Marjoram Herb Garden Seed from True Leaf Market. Origanum majorana. Marjoram is a tender perennial herb in warmer regions and grown as an annual in...
Statice Seeds - QIS Series
91-105 Days to maturity. Limonium sinuatum. Statice QIS Series Seeds. Non-GMO, Annual. QIS Series statice is easy to grow from seed and a favorite for fresh-cut arrangements, baskets, and bouquets....
Deluxe Microgreens Starter Kit
This deluxe microgreens growing kit has a larger selection of seeds and supplies to grow microgreens both hydroponically and in soil. If you are ready to dive into growing seeds...
Cabbage Seeds - Mammoth Red Rock
90 days. The Mammoth Red Rock cabbage has a beautiful reddish-purple tone to its heads, which have a subtle, delicate, and sweet flavor. It is a hardy crop, and grows...
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