Cimmaron

Lettuce

Zone 4b Save Garden

🌱 55d to harvest Rosette

Cimmaron romaine brings a crisp, cool crunch from the first bite—its leaves unfurl in a dense, upright head with a sweet, fresh f…

Crop Dates

Milestone	Date
Start Indoors	Apr 15th
Last Frost	May 13th
Transplant / Sow Outdoors	May 6th
Harvest Begins	Jun 30th
Harvest Ends	Sep 27th

Crop Details

Trait	Value
Days to Maturity	55
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	35
Harden Off (days)	6

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Frequently Asked Questions

What pests or diseases commonly hit Lactuca sativa (Cimmaron) and how do I manage them?

Leaf aphids are common on lettuce and can cause curling and stunted growth; rinse them off early and use insecticidal soap if they persist. In humid conditions, lettuce often develops downy mildew—avoid wetting leaves, space plants for airflow, and remove heavily affected leaves immediately to slow spread.

How often should I water Cimmaron lettuce during its main growing phase?

During the main growth period (about weeks 2–6 after germination), keep soil consistently moist but not soggy—aim for roughly 1 inch of water per week, adjusted for your weather. Water at the base and check soil depth: the top 1 inch should feel moist, while the soil below should drain well to prevent rot.

How can I tell when Cimmaron lettuce is ready to harvest?

Harvest when heads/leaf rosettes reach their expected size around 55 days, and leaves feel tender rather than tough. For best texture, pick in the morning and stop as soon as the plant starts to bolt (visible flower stalk), because bitterness increases once it shifts to flowering.

Cimmaron romaine brings a crisp, cool crunch from the first bite—its leaves unfurl in a dense, upright head with a sweet, fresh flavor and a pleasantly tender bite. Expect a clean, sturdy texture with a satisfying snap, ideal for garden-to-table salads and vibrant fresh preparations. Grow Cimmaron for reliable, midseason harvests around 55 days, when the heads are at their most lush and flavorful.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 35°F before moving outdoors. Harden off for 6 days first.

Expert Note

For cold-hardy romaine like Cimmaron, aim to transplant just before your coldest stretch ends and keep soil consistently moist for fast head/leaf development.