Long Island Improved Brussels Sprouts Seeds - Cool-Season Green Sprouts

Grow your own miniature cabbage-like sprouts with Long Island Improved Brussels sprouts seeds. Firm green sprouts develop along an upright central stem and offer a pleasantly cabbage-like flavor for roasting, steaming, and sautéing. Plan a long, cool growing season and pick the lower sprouts as they become firm, working upward as others develop.

Choose your seed quantity

This listing is for seeds to plant, not live plants or harvested sprouts. Choose:

• Small packet: 200 seeds
• 5 gram packet
• 1 oz pack
• 4 oz pack
• 1 lb pack

Bulk packs are sold by weight. Seed size and seed counts vary by lot; weight-based packs do not carry a guaranteed seed count.

Variety details

• Variety: Long Island Improved
• Crop: Brussels sprouts
• Botanical group: Brassica oleracea var. gemmifera
• Harvest: Green sprouts developing along the main stem
• Growing season: Cool weather, with a long period for establishment and sprout development
• Spacing: Approximately 24–30 inches between plants
• Life cycle: Usually grown for harvest in one season; a biennial when grown through flowering and seed production

Plant height, sprout size, and yield depend on conditions. Allow room for a substantial leafy plant rather than relying on a fixed compact height or guaranteed number of sprouts.

Plan for a cool-season harvest

Time sowing so sprout development occurs during cool weather. In many temperate gardens, plants are started ahead of a fall harvest; planting windows differ in mild-winter and hot climates. Use local planting guidance and allow ample time before severe winter conditions.

Light frost may improve flavor, but this does not mean plants tolerate every freeze or overwinter reliably in every location. Prolonged heat can interfere with firm sprout development.

Starting seeds

1. Sow approximately 1/4 inch deep in clean seed-starting mix.
2. Keep evenly moist without saturating the mix.
3. Provide strong light and good airflow after emergence.
4. Move seedlings into larger containers before roots become crowded.
5. Gradually acclimate seedlings to outdoor conditions before transplanting.

For transplants, start approximately 4–6 weeks before the intended planting date. Direct sowing may also suit local conditions where the season is long enough. Germination and growth vary with temperature, moisture, and seed condition.

Transplanting and soil

Choose full sun and fertile, well-drained soil. Incorporate suitable compost where needed and space plants approximately 24–30 inches apart, with enough room between rows for access and airflow. Set seedlings at approximately their previous growing depth and water gently.

Avoid planting repeatedly in the same bed after related cabbage-family crops. Crop rotation and clean growing practices help manage, but cannot eliminate, pest and disease problems.

Growing care

• Maintain consistent root-zone moisture, particularly during establishment and sprout development.
• Mulch established plants to conserve moisture and limit weeds, keeping mulch away from stems.
• Feed according to soil needs and fertilizer label directions; avoid excessive nitrogen.
• Weed shallowly to avoid damaging roots.
• Stake plants if wind or top-heavy growth makes support necessary.
• Remove yellowing or damaged lower leaves as needed, without stripping healthy foliage.

Inspect leaf undersides and developing sprouts for aphids and caterpillars. Suitable insect netting or row cover can help exclude pests when installed and maintained correctly. Choose any treatment according to the pest, crop, and label instructions.

Harvest timing and picking

Allow a long season. Approximately 90–120 days after transplanting is a general planning range, not a guaranteed date; temperature, plant health, and the desired sprout size affect readiness.

Begin when lower sprouts are firm, tightly formed, and approximately 1 inch across. Twist or cut them carefully from the stem, supporting the plant as you work. Harvest upward as the remaining sprouts become ready rather than waiting for every sprout to reach the same size.

Do not rely on uprooted plants continuing to mature sprouts in storage. Harvest usable sprouts before damaging weather and handle them gently.

Kitchen use and storage

Trim damaged outer leaves and wash before preparation. Roast for browned edges, steam until tender, or slice into sautéed dishes. Cooking time varies with sprout size.

Refrigerate harvested sprouts promptly and use while firm and fresh. For freezing, follow a tested blanching and freezing method. Discard moldy, slimy, or spoiled sprouts.

Saving and storing seeds

Seed production generally requires a plant to survive into its second growing season and receive suitable cold exposure. Overwintering success depends on climate and protection. Brussels sprouts can cross with other compatible Brassica oleracea crops, so isolation or controlled pollination is needed to maintain variety identity.

Store unused purchased seeds sealed in a cool, dry, dark place. Viability depends on age and storage conditions; a fixed storage life is not guaranteed. These seeds are intended for planting, not direct consumption or sprouting.