How to Grow Red Romaine

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Red Romaine

Lactuca sativa var. longifolia

vegetable

Red Romaine is a crisp, elongated lettuce variety with deep red to burgundy outer leaves and pale, tender inner leaves. It offers a mild, slightly sweet flavor with excellent crunch and is prized for salads and fresh eating. This cool-season crop is more heat-tolerant than many romaine varieties while retaining superior flavor and texture.

Looking for a specific variety?

Salvius Revolution Cimmaron Antibe Freckles Jericho

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Example Red Romaine timeline · Pittsburgh, PA (Zone 6b)

Plant Red Romaine
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Red Romaine
Around Jun 16

≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Red Romaine dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun to partial shade; 6+ hours of direct sunlight preferred; afternoon shade beneficial in hot climates

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Water: Consistent moisture is critical; water deeply 1-2 inches per week, more frequently in hot weather. Keep soil evenly moist but not waterlogged. Drip irrigation or soaker hoses minimize disease and bolting risk.

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Spacing: 8 inches

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Days to maturity: 60-75 days

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Planting depth: 0.25

Soil

Type: Well-draining, fertile loamy soil rich in organic matter

pH: 6.0-7.0

Amendments:

Compost Aged manure Peat moss or coconut coir Balanced fertilizer (10-10-10)

Growing Zones

Find your zone →

Zones 3-9; cool-season crop best in spring and fall, with some bolt resistance for early summer

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

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Growth Stages

Seedling

7-10 days

Small cotyledon leaves emerge; first true leaves develop with reddish tint.

Keep soil consistently moist. Provide bright light to prevent leggy growth. Thin seedlings to 2-3 inches apart after first true leaves appear. Protect from frost and cold drafts.

Juvenile Growth

14-21 days

Multiple true leaves unfold; red coloring becomes more pronounced; rosette begins forming with visible leaf development.

Thin progressively to final spacing (8 inches). Continue consistent watering. Apply balanced fertilizer at half strength every 2 weeks. Monitor for damping-off and fungal issues.

Vegetative/Foliage Development

21-35 days

Plant develops substantial leaf mass; head becomes firm and compact; rich red-burgundy coloring deepens on outer leaves.

Maintain even soil moisture—irregular watering increases bitterness and splitting. Side-dress with compost or low-nitrogen fertilizer. Watch for heat stress as days lengthen; provide afternoon shade if temperatures exceed 75°F consistently.

Head Formation

7-14 days

Inner leaves blanch to pale green-white; heads become dense and upright; outer red leaves protect inner tender leaves.

Continue consistent watering but reduce nitrogen to slow bolting. Check for tipburn by maintaining steady calcium levels and humidity. Harvest outer leaves if desired to maintain plant vigor.

Maturity & Harvest

Variable; harvest before bolting occurs

Head is full-sized, crisp, and firm with excellent red coloring; plant may begin to bolt as temperatures rise or day length extends.

Harvest in early morning for maximum crispness and moisture. Cut heads at soil level or harvest outer leaves continuously. Use within 1-2 days of harvest for best quality, or refrigerate to extend shelf life.

Companion Planting

Plan your garden →

Plant with:

Carrots Radishes Beets Strawberries Chives Dill Parsley Borage Marigolds Nasturtiums

Avoid planting near:

Cabbage Broccoli Cauliflower Fennel Parsnips Celery

Common Pests

Spray with water to dislodge; use insecticidal soap or neem oil; encourage beneficial insects like ladybugs; reflective mulches deter populations.
Monitor for curled, yellowing leaves; remove affected foliage; insecticidal soap; resistant varieties recommended for high-pressure areas.
and
Hand-pick in early morning; beer traps; copper barriers; diatomaceous earth around base; eliminate hiding spots (dense mulch, debris).
Hand-pick caterpillars; Bt (Bacillus thuringiensis) spray; row covers before infestation; encourage parasitic wasps.
Remove and destroy affected leaves; row covers on seedlings; spinosad spray; encourage parasitic wasps and tachinid flies.
Improve air circulation; avoid overhead watering; sulfur dust or neem oil spray; remove infected leaves; space plants adequately.
Use resistant varieties (e.g., 'Salvius'); remove infected leaves; improve ventilation; avoid wetting foliage; fungicide spray if necessary.

Uses

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Fresh Salads & Wraps

Culinary

Red Romaine's crisp texture and mild flavor make it ideal for Caesar salads, mixed green salads, and lettuce wraps. The sturdy leaves hold dressings well without wilting quickly. [source]

🍳

Grilled Lettuce

Culinary

Halved heads can be grilled whole for a warm side dish with caramelized outer leaves while inner leaves remain tender. The robust structure holds up better to heat than delicate greens. [source]

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Fresh Food Storage & Nutrition

Household

Red Romaine is low in calories (15 calories per 100g) but rich in vitamins K, A, and C, plus folate and fiber. Fresh harvested leaves can be stored refrigerated for up to 10 days. [source]

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Dietary & Digestive Support

Medicinal

High fiber content supports digestive health, while phytochemicals including polyphenols contribute to antioxidant properties. Traditional use in Mediterranean diets recognized for general wellness. [source]

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Pollinator & Beneficial Insect Support

Wildlife

Allowing some plants to bolt and flower produces delicate yellow blooms that attract bees and beneficial insects. Seed production supports birds later in the season. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest when heads are firm and full-sized, typically 60-75 days from planting. Cut heads at soil level in early morning for maximum crispness and water content. Alternatively, harvest outer leaves continuously starting 30 days after planting while allowing the head to continue growing. Avoid harvesting in hot afternoon; heads will be wilted and bitter. Use a sharp knife to minimize tissue damage. Harvest before the plant bolts (sends up a flower stalk), which is triggered by extended day length and sustained heat above 75°F.

Fun Facts

🌱 Red Romaine gets its striking burgundy color from anthocyanins, the same antioxidant pigments found in blueberries and red wine, which actually increase in concentration under cooler temperatures and UV exposure.
🌱 Romaine lettuce was named after Rome (where it was popular in Mediterranean cooking) and has been cultivated since ancient times; Roman naturalist Pliny the Elder documented its use around 77 CE.
🌱 Red Romaine is more tolerant of warmer temperatures and bolting than traditional green romaines, making it a better choice for spring gardeners in warmer zones or for early summer harvests in temperate regions.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Bolt Compost Full Sun Partial Shade True Leaves

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