Romaine Lettuce Vegetable Seeds Packet

$2.35

2025 Seed Prices

  • Order 1-95 assorted packets for $2.35 each
  • Order 96-499 assorted packets for $1.85 each
  • Order 500 or more assorted packets for $1.65 each

Romaine lettuce (Lactuca sativa var. longifolia) is a crisp, elongated-leaf variety of lettuce that is widely used in salads, sandwiches, and wraps. It is known for its sweet, slightly bitter flavor and crunchy texture. Romaine lettuce is one of the most nutritious types of lettuce, packed with vitamins A, C, and K, as well as folate and fiber. Unlike other lettuce varieties, romaine is more heat-tolerant, making it an excellent choice for home gardeners in a variety of climates. Romaine lettuce is a nutrient-rich, versatile leafy green that is easy to grow in a home garden. With consistent moisture, full sun, and well-draining soil, you can enjoy a steady supply of fresh, crisp romaine leaves.

SKU: SEROLE
Barcode: 843458160700

Product Detail

Order in multiples of: 12

  • Year Designed: 2024
Quick Seed Overview
  • Plant Type: Annual
  • Genus: Lactuca
  • Species: Sativa
  • Plant Height/Width: 8–12 in tall x 6–8 in wide
  • Exposure: Full Sun to Part Shade
  • Difficulty: Easy

Why Shido Seeds Are the Best

Our flower and vegetable seeds are beautifully packaged little packets of magic. Guaranteed to turn your garden into the envy of the neighborhood. Get your hands dirty and let nature simply do its thing.

How to Plant Romaine Lettuce from Seed

When to Plant Seeds

  • Spring Planting: Start seeds indoors 4-6 weeks before the last frost, or direct sow 2-3 weeks before the last frost.
  • Fall Planting: Sow seeds 8-10 weeks before the first expected frost.
  • In mild climates, romaine can be grown year-round with adequate shade in summer.

Preparing for Planting

  1. Choose a location with full sun and well-draining soil.
  2. If planting in containers, use a pot at least 6 inches deep with drainage holes.
  3. Work compost or organic matter into the soil before planting.

Sowing Seeds Outdoors

  1. Sow seeds 1/4 inch deep in rows spaced 12-18 inches apart.
  2. Thin seedlings to 6-8 inches apart once they reach 2-3 inches tall.
  3. Water gently to keep soil moist, avoiding overwatering.
  4. Germination takes 7-14 days in optimal conditions.

Transplanting Seedlings

  1. Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days.
  2. Transplant when plants are 3-4 inches tall, spacing them 6-8 inches apart.
  3. Water immediately after transplanting to help roots establish.

Pro Tip

For crisp, tender romaine lettuce, keep the soil consistently moist and harvest leaves from the outside first to encourage continuous growth. To prevent bitterness, provide partial shade in hot weather and water in the morning to keep plants cool throughout the day.

Bonus: Succession plant every two weeks for a steady supply!

Getting to know Romaine Lettuce

Romaine lettuce grows in an upright formation, with long, sturdy leaves that range from light to dark green. The leaves have a slightly bitter taste, with the ribs providing a refreshing crunch. The plant can reach heights of 8-12 inches (20-30 cm) and typically forms a loose head rather than a compact, round one like iceberg lettuce.

What it's used for

1. Culinary Uses:

  • The crisp texture and mild flavor make it a favorite for salads.
  • Leaves can be used as a low-carb wrap alternative.
  • Romaine lettuce is often grilled or sautéed to bring out its sweetness.
  • Its sturdy leaves hold dressings well, making it ideal for heartier salads.

2. Nutritional Benefits:

  • High in vitamin A, which supports eye health.
  • Good source of vitamin K, essential for bone health and blood clotting.
  • Contains antioxidants and fiber, aiding digestion and overall wellness.
  • Low in calories and high in water content, making it hydrating and diet-friendly.

3. Ornamental and Companion Planting:

  • Romaine lettuce makes an excellent border plant in vegetable gardens.
  • It pairs well with carrots, radishes, and onions, as they help deter pests.
  • Acts as a natural mulch by shading the soil and retaining moisture.
Growth Requirements

Light:

  • Prefers full sun (at least 6 hours per day) but can tolerate partial shade in warmer climates.

Soil:

  • Grows best in loamy, well-draining soil rich in organic matter.
  • Ideal soil pH: 6.0-6.8.
  • Adding compost before planting improves moisture retention and nutrients.

Watering:

  • Requires consistent moisture to prevent bitterness and bolting.
  • Water deeply and evenly, keeping soil slightly moist but not soggy.
  • Mulching around the plants helps retain moisture and regulate soil temperature.

Temperature & Climate:

  • Thrives in cool weather, with optimal growth at 55-70°F (13-21°C).
  • Can tolerate light frosts but struggles in excessive heat.
  • Shade cloth or afternoon shade can extend the growing season in summer.

Fertilization:

  • Apply a balanced, organic fertilizer (such as a 10-10-10 formula) every 2-3 weeks.
  • Side-dress plants with compost or aged manure for additional nutrients.
Maintenance

Mulching:

  • Apply a light layer of mulch around plants to retain moisture and regulate soil temperature.

Pruning & Thinning:

  • Thin seedlings early to prevent overcrowding.
  • Remove outer leaves regularly to encourage new growth.

Harvesting:

  • Romaine lettuce is ready to harvest in 60-75 days.
  • Cut outer leaves individually or harvest the entire head by cutting at the base.
  • For a continuous harvest, plant new seeds every 2-3 weeks.

Refrigeration:

  • Store unwashed romaine in a perforated plastic bag in the refrigerator for up to 10 days.
  • Wash just before use to prevent excess moisture buildup.

Freezing:

  • Blanch and freeze for soups or smoothies, though texture may change.
Pests and Diseases

Common Pests:

  • Aphids: Rinse off with water or apply neem oil.
  • Slugs & Snails: Use diatomaceous earth or beer traps.
  • Leaf Miners: Remove affected leaves and encourage natural predators like ladybugs.

Common Diseases:

  • Downy mildew: Improve air circulation and avoid overhead watering.
  • Bottom rot: Ensure well-draining soil and proper spacing.
  • Tip burn: Maintain consistent moisture levels to prevent leaf scorch.

Growing Together with Shido

At Shido, everything we do starts with one goal: helping you have a truly successful growing experience. We know that planting seeds is just the beginning — your time, energy, and love for gardening are the real magic. That’s why we make sure the seeds you plant are fresh, full of life, and top-quality. When you choose Shido, you’re planting with confidence. We guarantee it.

Our mission is simple: bring you exceptional varieties of high-quality seeds at prices you’ll love, share detailed sowing and growing tips so you can thrive as a home gardener, and deliver the best customer service in the industry — with a smile.

Our Seed Safety Promise

We do not sell genetically modified seeds — ever. And we don’t use genetic engineering to breed new varieties. Instead, our skilled breeders use traditional, natural crossing methods to create hybrid seeds that are healthy, safe, and packed with potential.

Our Seed Quality Guarantee

At Shido, we believe great gardens start with great seeds — and that means quality comes first. Every seed lot we offer is ensure to generate top-notch germination because your garden deserves nothing less.

To keep our seeds at their peak, we run thorough pathology tests at trusted outside labs. When you open a Shido seed packet, you can trust it’s been nurtured, tested, and approved to give you strong, healthy plants from the very first sprout.

Types of Seeds We Offer

Hybrid Seeds (F1)

F1 hybrid seeds are the garden’s high achievers — created by crossing two specially chosen parent plants for superior vigor, uniformity, and performance. We use only traditional breeding methods to produce these powerhouse seeds.

Open-Pollinated & Heirloom Seeds

Our open-pollinated (OP) seeds naturally reproduce through wind, insects, water, or self-pollination. When grown in isolation, they produce true-to-type plants year after year.

Among our OP seeds are treasured heirloom varieties — old favorites that have been carefully passed down for generations. While OP plants can be less uniform than hybrids, we run our Open-Pollinated Project to select the most reliable, flavorful, and beautiful strains. Many are also available as certified organic seeds.

Non-GMO: What It Means and Why It Matters

GMO (Genetically Modified Organism) is created when scientists alter a plant’s DNA in a lab — often by inserting genes from completely unrelated species — to achieve certain traits, like pest resistance or herbicide tolerance. This is a far cry from natural plant breeding.

At Shido, we believe gardening should stay as close to nature as possible. All our seeds — whether hybrid, heirloom, organic, or open-pollinated — are Non-GMO. They’re bred using traditional methods that respect natural biodiversity, giving you safe, wholesome seeds that grow into plants just as nature intended.

When you plant Shido Non-GMO seeds, you’re choosing purity, sustainability, and peace of mind — along with a garden full of flavor, color, and beauty.

Vacuum-Sealed for Freshness — Good for 10 Years

Every Shido seed packet isvacuum-sealedto lock in freshness and protect your seeds from moisture, air, and pests. This careful packaging not only preserves their quality but also extends their shelf life dramatically. Stored properly in a cool, dry place, our seeds remain viable for up to10 years— so you can plant them now, next season, or even years down the road. Whether you’re planning a garden this spring or building a long-term seed stash, Shido seeds are ready when you are

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