Grow hearty brassicas that feed your family and lift your garden with ease.
Choose varieties suited to your season and soil: Copenhagen cabbage for solid heads, Long Island Brussels for frost-sweet sprouts, White Vienna kohlrabi for crisp bulbs, Black Knight tatsoi for fast baby greens, and Gunsho choy sum for tender stems.
Plant at the correct depth and time, select healthy non-GMO seed, and store seeds cool and dry for reliable germination next season.
These practical choices and simple steps produce abundant, flavorful cruciferous harvests.
| Copenhagen Heirloom Cabbage Seeds (Approx. 200) |
| Best Classic Pick | Variety (species/cultivar): Copenhagen Cabbage (Brassica oleracea var. capitata) | Seed Type / Heritage: Heirloom, non-GMO | Packet Quantity / Seed Count: Approx. 200 seeds | VIEW LATEST PRICE | Read Our Analysis |
| Long Island Improved Brussels Sprout Heirloom Seeds (500) |
| Cold-Season Favorite | Variety (species/cultivar): Long Island Improved Brussels Sprouts (Brassica oleracea) | Seed Type / Heritage: Heirloom, open-pollinated, non-GMO | Packet Quantity / Seed Count: 500 seeds | VIEW LATEST PRICE | Read Our Analysis |
| White Vienna Kohlrabi Seeds — Non-GMO Heirloom |
| Beginner-Friendly Choice | Variety (species/cultivar): White Vienna Kohlrabi (Brassica oleracea variant) | Seed Type / Heritage: Heirloom, non-GMO, open-pollinated | Packet Quantity / Seed Count: (Single packet — unspecified exact count; small packet typical for home gardeners) — packeted seeds | VIEW LATEST PRICE | Read Our Analysis |
| Sow Right Black Knight Tat SOI Chinese Mustard Seeds |
| Stir-Fry Star | Variety (species/cultivar): Black Knight Tatsoi (Brassica rapa var. narinosa) | Seed Type / Heritage: Heirloom, non-GMO | Packet Quantity / Seed Count: ~350 seeds (minimum 750 mg per packet ≈ 350 seeds) | VIEW LATEST PRICE | Read Our Analysis |
| Choy Sum (Brassica Juncea) Asian Vegetable Seeds |
| High-Yield Workhorse | Variety (species/cultivar): Choy Sum / Gunsho (Brassica juncea) | Seed Type / Heritage: Traditional variety (Gunsho), open-pollinated (implied heirloom-style) | Packet Quantity / Seed Count: 2500+ seeds | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Copenhagen Heirloom Cabbage Seeds (Approx. 200)
Should you want an easy-to-grow, reliable cabbage that fits small gardens or big beds, Copenhagen Heirloom Cabbage is a great pick because each packet gives you about 200 non-GMO seeds and a lot of planting options. You’ll sow them 1/4 inch deep and space seedlings 1 to 2 inches apart, with rows about 2 inches apart. They do well in zones 3 to 12, in composite soil, and like full sun to partial shade. Expect heads in 65 to 75 days. You’ll enjoy sweet, tender cabbage for salads, soups, stir-fries, and pickling, plus a healthy, low-calorie lift.
- Variety (species/cultivar):Copenhagen Cabbage (Brassica oleracea var. capitata)
- Seed Type / Heritage:Heirloom, non-GMO
- Packet Quantity / Seed Count:Approx. 200 seeds
- Growing Season / Temperature Preference:Prefers warmer temperatures; mature in 65–75 days
- Culinary Uses:Salads, soups, stir-fries, pickling
- Packaging & Supplier Notes:Packet by Axels Garden Seeds (heirloom non-GMO)
- Additional Feature:Heirloom, non-GMO
- Additional Feature:Matures in 65–75 days
- Additional Feature:Supports digestion
Long Island Improved Brussels Sprout Heirloom Seeds (500)
Whenever you want reliable, high-yield Brussels sprouts for cool-season gardening, Long Island Improved is a smart pick that rewards patience. You’ll love this heirloom from the 1890s because it’s open-pollinated and non-GMO, so you can save seed with confidence. Plant in full sun and fertile, well-drained soil once temperatures hover around 60 to 65°F. Harvest 1 to 2 inch sprouts from the bottom up, and enjoy sweeter, nuttier flavor after light frosts. A pack of 500 fresh seeds comes in moisture-resistant packaging with clear sowing instructions, so you’ll have plenty for now and next season.
- Variety (species/cultivar):Long Island Improved Brussels Sprouts (Brassica oleracea)
- Seed Type / Heritage:Heirloom, open-pollinated, non-GMO
- Packet Quantity / Seed Count:500 seeds
- Growing Season / Temperature Preference:Thrives in cool temperatures; ideal fall crop (sweetens after frost)
- Culinary Uses:Steaming, roasting, sautéing, grilling
- Packaging & Supplier Notes:Packaged from growers; tear- and moisture-resistant packet with sowing instructions
- Additional Feature:Dates to 1890s
- Additional Feature:Flavor sweetens after frost
- Additional Feature:Moisture-resistant packaging
White Vienna Kohlrabi Seeds — Non-GMO Heirloom
Whenever you want an easy, reliable cool-season crop that’s fun for kids and satisfying for adults, White Vienna kohlrabi seeds are a great pick for your 2026 garden. You’ll enjoy a non-GMO heirloom, open-pollinated seed from a small family packer who cares about your success. Plant in cool weather for a fall harvest; both the pale bulb and green leaves taste mild, like a sweet turnip, and work fresh or pickled. Seeds come in a paper packet with planting and seed-saving tips, and they’re tested for germination. Store them cool and dry, and they’ll stay viable for years.
- Variety (species/cultivar):White Vienna Kohlrabi (Brassica oleracea variant)
- Seed Type / Heritage:Heirloom, non-GMO, open-pollinated
- Packet Quantity / Seed Count:(Single packet — unspecified exact count; small packet typical for home gardeners) — packeted seeds
- Growing Season / Temperature Preference:Cool-season crop; ideal for fall harvest
- Culinary Uses:Fresh eating, pickling, storage
- Packaging & Supplier Notes:Paper packet from small family-owned business; planting/germination instructions
- Additional Feature:Both bulb and leaves edible
- Additional Feature:Packets include seed-saving tips
- Additional Feature:Tested germination performance
Sow Right Black Knight Tat SOI Chinese Mustard Seeds
You’ll love Sow Right Black Knight Tatsoi Chinese mustard seeds provided you want a cold-hardy, fast-growing leafy green that’s easy to grow and shines in both baby leaf salads and hot stir-fries. You’ll get a large premium packet with about 350 non-GMO heirloom seeds and clear instructions. Plant 1/4 inch deep, space 12 to 16 inches, and expect germination in 8 to 12 days at 45 to 80°F. Mature plants reach 8 to 12 inches in 35 to 50 days. The dark spoon-shaped leaves are nutrient rich and hold up well to cooking. The company runs on solar power and honors the Safe Seed Pledge, and support will help should seeds don’t sprout.
- Variety (species/cultivar):Black Knight Tatsoi (Brassica rapa var. narinosa)
- Seed Type / Heritage:Heirloom, non-GMO
- Packet Quantity / Seed Count:~350 seeds (minimum 750 mg per packet ≈ 350 seeds)
- Growing Season / Temperature Preference:Cool-season; spring or fall; cold-hardy
- Culinary Uses:Stir-fries and other Asian dishes (leafy greens)
- Packaging & Supplier Notes:Large premium packet, instructions included; company follows Safe Seed Pledge
- Additional Feature:Solar-powered operation
- Additional Feature:Replacement if germination fails
- Additional Feature:Large premium packet (~350 seeds)
Choy Sum (Brassica Juncea) Asian Vegetable Seeds
Gardeners who want a fast, forgiving Asian green that feeds both family meals and quick stir-fries will love Choy Sum from our 2026 Brassica seed lineup. You’ll get over 2500 seeds of Choy Sum Gunsho, a vigorous Brassica juncea that matures around 80 days. It forms a large frame with thick green stems, rounded mid-green leaves, and flowering stems you can harvest. Young leaves taste between cabbage and spinach, while older ones gain a mild kick and more sweetness after bolting. Plant in rich, well-drained soil, give sun or partial shade depending on heat, and try 20 cm containers.
- Variety (species/cultivar):Choy Sum / Gunsho (Brassica juncea)
- Seed Type / Heritage:Traditional variety (Gunsho), open-pollinated (implied heirloom-style)
- Packet Quantity / Seed Count:2500+ seeds
- Growing Season / Temperature Preference:Prefers cooler conditions; heat-sensitive (grow in cool regions/full sun or partial shade in warm regions)
- Culinary Uses:Stir-fries, soups, Cantonese dishes; whole plant edible (flowers, buds, stems)
- Packaging & Supplier Notes:Packaged with quantity indicated (2500+ seeds); variety named and growing guidance included
- Additional Feature:2500+ seeds per pack
- Additional Feature:Whole-plant edible (flowers)
- Additional Feature:Heat-sensitive; use partial shade
Factors to Consider When Choosing Brassica Vegetable Seeds
As you pick Brassica seeds, check the seed viability and age initially so you won’t plant seeds that won’t sprout. Then match the variety to your climate and USDA zone and to the days to maturity so plants fit your season. Also look for disease resistance and consider how you’ll use the harvest in the kitchen so your crop is both healthy and delicious.
Seed Viability And Age
In case you want reliable crops, start through checking the age and condition of your brassica seeds before you plant. You’ll find most cabbage, broccoli, kohlrabi, Brussels sprout, and mustard seeds stay strong for one to three years. After the initial year, expect germination to fall by about ten to twenty percent each year unless stored well. Keep seeds cool, dry, and dark to slow loss. Ideal conditions are near freezing and low humidity, but room heat and damp air will speed deterioration.
If seed is older, do a simple germination test with ten to twenty seeds on a damp towel at the right temperature. Toss seeds that look shriveled, discolored, or brittle, or save them only for tiny trials.
Climate And USDA Zone
Now that you’ve checked seed age and germination, you’ll want to match those seeds to your climate and USDA zone so they can actually grow into healthy plants. You’ll find most brassicas prefer cool conditions, with daytime temps near 45–75°F being ideal for cabbage, broccoli, kohlrabi, Brussels sprouts, and mustards. Check your USDA zone to plan timing. Zones 3–10 can grow brassicas, but you must align variety choice with frost dates and the length of your cool season. Should you be warm-climate, plant in fall or winter or pick heat-tolerant, quick types to avoid bolting and bitterness. In contrast, when you’re cold-climate, know that light frost often improves flavor, but hard freezes or wet, cold soil can harm seedlings and cut yield.
Days To Maturity
Consider days to maturity as your planting calendar’s heartbeat; it tells you how long a brassica seed or transplant will need to reach harvest and helps you plan every step with confidence. You’ll see ranges from about 35 days for baby greens to 85 plus days for mature heads and stalks. Shorter timings, roughly 30 to 50 days, let you succession plant and enjoy quick salads or tender stems. Longer timings, 60 to 90 plus days, suit full sized cabbage, kohlrabi, and Brussels sprouts. Check whether days are seed to harvest or transplant to harvest since transplant timelines can be one to three weeks shorter. Recall cool weather slows growth and warm, ideal temperatures speed it up. Count backward from your target harvest or initial frost to set planting dates.
Disease Resistance Traits
Whenever you pick seeds, disease resistance should feel like a safety net that lets you relax a little while you grow brassicas. Look for seed descriptions that name resistance to clubroot, black rot, downy mildew, and Alternaria leaf spot because those traits cut yield loss. You’ll often see codes or R gene names; match those to the pathogens in your region before you buy. Prefer varieties with multiple resistance genes or broad tolerance since single gene resistance can fail over time. Also choose certified disease free seed lots and check germination and phytosanitary info on the label. Use seed treatments whenever sensible. Finally, pair genetic resistance with rotation, soil pH fixes for clubroot, sanitation, and proper spacing to keep plants healthy.
Culinary And Usage Needs
Because what you plan to eat should guide what you plant, pick brassica seeds with the kitchen in mind and you’ll save time and fall in love with your harvest. Choose based on edible part: heads like cabbage and kohlrabi need different care than sprouts, leafy greens, or flowering stems. Next match flavor to use: mild and sweet varieties are great raw in salads, nutty-sweet types roast beautifully, and peppery greens lift stir-fries. Consider timing too: fast-maturing baby leaves (30 to 50 days) feed you quickly while slow crops (60 to 80 plus days) give full heads or bulbs for bigger meals. Consider storage and prep because cabbage and kohlrabi keep for weeks while tender greens need same-week use. Pick multi-use varieties to stretch one crop into many meals.
