Romaine Lettuce Vegetable Seeds Packet

$4.95

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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
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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.

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Pretty Pots for Pretty Plants

Your plants work hard to look good—shouldn’t their pots do the same? Choose from our gorgeous flower pots and let your greenery thrive in style. Because plain plastic is just rude.

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