- Hardiness Zone: 2-11 Annual
Seed Depth: 1/4 inch
Seed Spacing: 8–12 inches
Row Spacing: 12–18 inches
Sunlight: Full sun to partial shade
Days to Sprout: 7–10 days
Days to Maturity: 55–65 days
Growth Habit: Compact, Upright
Sunlight: Choose a location that receives full sun to partial shade. Lettuce grows best in cooler temperatures and can benefit from some afternoon shade in warmer climates.
Soil: Prefers well-drained, fertile soil with a pH between 6.0 and 7.0. Lettuce thrives in soil rich in organic matter, so amend the soil with compost or well-rotted manure before planting.
When to Plant: Coolguard Lettuce is a cool-season crop that can be planted in early spring or late summer for a fall harvest. In regions with mild winters, it can also be grown throughout the winter. Start seeds indoors 4-6 weeks before the last expected frost date in spring, or sow seeds directly in the garden as soon as the soil can be worked. For a fall crop, sow seeds in late summer or early fall.
Direct Sowing: Sow seeds 1/4 inch deep and 6-12 inches apart in rows spaced 12-18 inches apart. Lettuce seeds are small, so try to space them evenly. Thin seedlings to 6-12 inches apart once they are a few inches tall to allow enough space for the plants to develop.
Transplanting: If starting indoors, transplant seedlings outdoors when they are 3-4 inches tall and the danger of frost has passed. Space plants 6-12 inches apart in rows spaced 12-18 inches apart.
Succession Planting: Sow every 2–3 weeks for a continuous harvest throughout the season.
Watering: Keep the soil consistently moist but not waterlogged. Lettuce has shallow roots and requires regular watering, especially during dry periods, to ensure even moisture. Mulching around the plants can help retain soil moisture and keep the soil cool.
Fertilization: Lettuce benefits from a nutrient-rich soil but does not require heavy fertilization. Apply a balanced fertilizer or compost at planting time. If the leaves appear pale or growth slows, side-dress with compost or a balanced fertilizer.
Mulching and Weeding: Apply a layer of mulch around the plants to retain soil moisture, suppress weeds, and keep the soil temperature consistent. Lettuce is sensitive to heat, and mulch can help keep the soil cool. Hand-pull weeds carefully to avoid disturbing the shallow roots of the lettuce.
Pruning: Remove outer leaves as needed for harvest and to maintain plant health.
Pest and Disease Management: Lettuce can be susceptible to pests such as aphids, slugs, and cutworms. Use organic pest control methods like neem oil, diatomaceous earth, or hand-picking to manage infestations. Practice crop rotation and ensure good air circulation to prevent fungal diseases like downy mildew and leaf spot.
When to Harvest: Coolguard Lettuce is typically ready to harvest 45-55 days after planting. Harvest the outer leaves as needed for a "cut-and-come-again" approach, or wait until the entire head is mature. Lettuce is best harvested in the morning when the leaves are crisp and cool.
How to Harvest: For leaf lettuce, simply cut the outer leaves at the base, leaving the inner leaves to continue growing. For head lettuce, cut the entire plant at the base when the head is firm and mature. Handle the leaves gently to avoid bruising.
Storing Fresh Lettuce: Freshly harvested lettuce can be stored in the refrigerator for up to a week. Wash the leaves and dry them thoroughly before storing in a plastic bag or container with a damp paper towel to retain moisture.
Why You’ll Love It
Coolguard Lettuce is a dependable heirloom variety bred for cool-weather growing and bolt resistance. Its loose, open heads produce tender, crisp green leaves that hold up well in spring and fall conditions — and even withstand light frosts. Perfect for succession planting, this variety allows you to harvest outer leaves or full heads depending on your kitchen needs. Ideal for fresh salads, wraps, and sandwich layering.
Plant Characteristics
Height: 8–10 inches
Growth Habit: Loose-leaf rosette
Leaf Type: Broad, ruffled green leaves with crisp texture
Days to Maturity: 50–60 days
Hardiness: Cool-season annual
Flavor and Culinary Uses
Flavor: Mild, clean, and crisp with a tender bite
Culinary Uses: Great for salads, sandwiches, lettuce wraps, and fresh garnishes. Holds up well with dressings and layers beautifully in dishes.
Companion Planting Tips
Good Companions: Carrots, radishes, onions, and strawberries
Avoid Planting Near: Brassicas that may shade or compete for nutrients
Bonus Benefit: Excellent choice for early spring and late fall planting — tolerates cold snaps better than many lettuces
Common Issues and Solutions
Bolting in Warm Weather: Plant early or late in the season and provide partial shade in heat
Bitter Leaves: Harvest consistently before plants mature fully to maintain tenderness and mild flavor
Slugs or Aphids: Use organic slug traps or neem spray — spacing plants well can improve airflow and reduce pests
Seeds Per Packet
500mg | Approximately 120 |
1g | Approximately 240 |
3g | Approximately 720 |
5g | Approximately 1,200 |
Why You’ll Love It
Coolguard Lettuce is a dependable heirloom variety bred for cool-weather growing and bolt resistance. Its loose, open heads produce tender, crisp green leaves that hold up well in spring and fall conditions — and even withstand light frosts. Perfect for succession planting, this variety allows you to harvest outer leaves or full heads depending on your kitchen needs. Ideal for fresh salads, wraps, and sandwich layering.
Plant Characteristics
Height: 8–10 inches
Growth Habit: Loose-leaf rosette
Leaf Type: Broad, ruffled green leaves with crisp texture
Days to Maturity: 50–60 days
Hardiness: Cool-season annual
Flavor and Culinary Uses
Flavor: Mild, clean, and crisp with a tender bite
Culinary Uses: Great for salads, sandwiches, lettuce wraps, and fresh garnishes. Holds up well with dressings and layers beautifully in dishes.
Companion Planting Tips
Good Companions: Carrots, radishes, onions, and strawberries
Avoid Planting Near: Brassicas that may shade or compete for nutrients
Bonus Benefit: Excellent choice for early spring and late fall planting — tolerates cold snaps better than many lettuces
Common Issues and Solutions
Bolting in Warm Weather: Plant early or late in the season and provide partial shade in heat
Bitter Leaves: Harvest consistently before plants mature fully to maintain tenderness and mild flavor
Slugs or Aphids: Use organic slug traps or neem spray — spacing plants well can improve airflow and reduce pests
Seeds Per Packet
500mg | Approximately 120 |
1g | Approximately 240 |
3g | Approximately 720 |
5g | Approximately 1,200 |
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