How to Grow Cimmaron Romaine
Lactuca sativa 'Cimmaron'
Cimmaron Romaine is a hardy, cool-season lettuce variety prized for its crisp texture and resistance to bolting in warmer weather. Gardeners grow this hybrid for its reliable yield and ability to tolerate light frosts, making it an excellent choice for spring and fall gardens across many zones.
📷 Wikimedia CommonsStarting Cimmaron Romaine: indoors or direct sow?
🌾 Sow directly in the garden — Cimmaron Romaine is not usually started indoors.
Direct sow seeds outdoors 2-6 weeks before the last frost date since this plant is typically not transplanted from containers due to root sensitivity.
Soil, care & harvest
Prepare loose soil with a pH between 6.0 and 7.0 before sowing seeds directly outdoors or starting them indoors. Sow seeds 2-6 weeks before your last expected frost date, as this cool-season crop tolerates light cold. Plant the seed at a depth of about one-quarter inch to ensure successful germination within 7 to 14 days.
Space plants 6 to 8 inches apart in rows that are similarly spaced to allow proper air circulation. Keep soil consistently moist, providing 1 to 1.5 inches of water weekly, and apply a light mulch to retain moisture. Do not use heavy trellises or supports, as this lettuce grows low to the ground without needing vertical assistance.
Watch for aphids, thrips, leafminers, slugs, and snails; hand-pick pests or use organic controls like diatomaceous earth. Monitor for downy mildew, mosaic virus, and bacterial leaf spot by ensuring good airflow and avoiding overhead watering. Harvest outer leaves 55 to 65 days after sowing when heads are firm but still tender.
When to Plant Cimmaron Romaine
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | — | June – July | August – September |
| Zone 2 | — | May – July | July – September |
| Zone 3 | — | May – June | July – October |
| Zone 4 | — | April – June | June – October |
| Zone 5 | — | April – May | June – November |
| Zone 6 | — | April – May | June – November |
| Zone 7 | — | March – May | May – November |
| Zone 8 | — | March – April | May – December |
| Zone 9 | — | February – March | April – December |
| Zone 10 | — | January – March | March – December |
| Zone 11 | — | January – February | February – December |
| Zone 12 | — | January – February | February – December |
| Zone 13 | — | January – February | February – December |
Companion Plants for Cimmaron Romaine
✓ Good companions
Repels aphids and whiteflies, may improve lettuce flavor
Deep roots don't compete with shallow lettuce roots, provides ground cover
Deters aphids and other soft-bodied insects that damage lettuce
Repels aphids, slugs, and other pests that commonly attack lettuce
Repels nematodes and aphids, attracts beneficial insects
Acts as trap crop for aphids and cucumber beetles, attracts beneficial predators
Quick-growing, helps break up soil and can be harvested before lettuce needs space
Similar growing requirements, can be interplanted for succession harvests
✗ Keep away from
Competes for nutrients and space, can shade lettuce and stunt growth
Inhibits growth of most garden plants including lettuce through allelopathy
Tall growth creates excessive shade and competes heavily for water and nutrients
Nutrition Facts
Per 100g serving (USDA FoodData Central)
