Romaine Lettuce Vegetable Seeds Packet

• Garden bed or seed trays: Can be direct sown or transplanted.
• Seed-starting mix (if transplanting): For a clean, early start.
• Row cover (optional): Extends the cool-season window and deters early pests.

• A knife: For cutting the whole head at soil level.
• Basket: For collecting heads or leaves.
• Salad spinner and airtight storage: For removing moisture and extending fridge life.

Tip: Harvest in the morning after dew has dried -- this gives noticeably crisper texture and better shelf life than an afternoon harvest, when leaves have already lost some moisture to the day's heat.

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.

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.

• Planting through peak summer heat — bolts and turns bitter quickly once temperatures climb -- plant early enough to mature before hot weather, or plan for afternoon shade
• Harvesting late in the day — morning harvest, after dew dries, gives noticeably crisper texture and better shelf life

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.

• Leaves: The whole head is eaten -- there is no separate inedible part beyond the very base where roots attach.

Raw romaine, per 100g

Calories: 17 kcal

• Carbohydrates: 3.3 g
• Protein: 1.2 g
• Total fat: 0.3 g
• Dietary fiber: 2.1 g
• Vitamin C: 4 mg (4% RDA)
• Folates: 136 µg (34% RDA) -- surprisingly good for a mostly-water lettuce
• Potassium: 247 mg
• Cholesterol: 0 mg
• Vitamin A and K: both notably higher than pale iceberg-type lettuce

Good companions

• Carrots, radishes — classic companion pairing, low competition
• Cucumbers, strawberries, onions — compatible timing and low competition

Poor companions / avoid

• Crowded plantings generally — no strongly antagonistic companion documented, but crowding raises disease risk for this crop

• Aphids — cluster in the tight leaf center, harder to spot than on open-leaf lettuce
• Slugs and snails — damage at soil level, worse in wet conditions
• Leafminers — tunneling trails in leaves

• Downy mildew — named modern romaine varieties often carry resistance to specific races -- worth asking about for this SKU
• Lettuce drop (Sclerotinia) — causes sudden collapse at the base, favored by wet soil
• Bottom rot — affects lower leaves in contact with wet soil

Romaine thrives in cool weather and well-drained, fertile soil, growing upright with sturdy leaves that develop their signature crunch best under consistent watering rather than stressed, inconsistent conditions. Mulching also helps regulate soil moisture during unpredictable spring or fall temperature swings. Mulching also helps regulate soil moisture during unpredictable seasonal temperature swings.

Its sturdy ribs provide a genuinely satisfying crunch that holds up to a heavier dressing, unlike more delicate lettuce varieties that would wilt or go soggy under the same treatment. That structural sturdiness is really the whole reason romaine became the standard base for that particular salad. That sturdiness is really the whole reason it became the standard base for that dish.

No, generally not — romaine typically grows into a looser, more open head, which makes it easier to separate leaf by leaf compared to iceberg's dense, compact structure. Either growth habit produces the same crisp, familiar texture people actually associate with romaine specifically. Either shape delivers the same crisp texture people specifically associate with romaine.

Yes, outer leaves can be picked as needed to extend a single planting's usefulness, though many gardeners also harvest the entire head at once for a more traditional presentation. Harvesting outer leaves first also lets the inner leaves keep developing for a later picking. Harvesting outer leaves first also gives inner leaves more time to keep developing.

A slightly bitter edge is actually characteristic of the variety, balanced by the crisp ribs, though heat stress or inconsistent watering can intensify that bitterness beyond what's typical. That balance between bitterness and crunch is really what defines the variety's overall character. That balance between bitterness and crunch is really what defines the variety's character.

Vacuum-sealed Shido Seeds packets stay viable for up to 10 years when stored properly, compared to roughly one year for a standard paper seed packet exposed to normal air and humidity. Cool, dry storage further extends that shelf life beyond the basic guarantee. That reliability matters given how much this variety's reputation depends on consistent texture.

Yes, provided the container is wide enough to support the upright growth habit and receives consistent watering to keep the leaves genuinely crisp rather than tough. A five-gallon container generally provides enough room for a full-sized romaine plant to develop properly. A five-gallon container generally provides enough room for a full romaine plant.

Yes — every Shido Seeds packet, romaine included, is germination-tested at independent third-party labs before it ever reaches a shelf. That scrutiny matters given how much this variety's reputation depends on consistent texture. No shortcuts taken on a variety this widely relied upon. No shortcuts taken across the whole catalog.