Cimmaron

Family: Asteraceae Leafy Green

Planting Schedule

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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.

Light: Full SunMaturity: 55 DaysHabit: Rosette

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Cimmaron Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	May 4th	May 25th	Jul 19th – Aug 1st
Zone 2a	Apr 27th	May 18th	Jul 12th – Aug 29th
Zone 2b	Apr 17th	May 8th	Jul 2nd – Aug 25th
Zone 3a	Apr 17th	May 8th	Jul 2nd – Sep 1st
Zone 3b	Apr 21st	May 12th	Jul 6th – Sep 21st
Zone 4a	Apr 17th	May 8th	Jul 2nd – Sep 24th
Zone 4b	Apr 15th	May 6th	Jun 30th – Sep 27th
Zone 5a	Apr 10th	May 1st	Jun 25th – Sep 30th
Zone 5b	Apr 6th	Apr 27th	Jun 21st – Oct 5th
Zone 6a	Apr 3rd	Apr 24th	Jun 18th – Oct 10th
Zone 6b	Mar 28th	Apr 18th	Jun 12th – Oct 16th
Zone 7a	Mar 23rd	Apr 13th	Jun 7th – Oct 20th
Zone 7b	Mar 13th	Apr 3rd	May 28th – Oct 28th
Zone 8a	Mar 4th	Mar 25th	May 19th – Nov 5th
Zone 8b	Feb 23rd	Mar 16th	May 10th – Nov 12th
Zone 9a	Feb 6th	Feb 27th	Apr 23rd – Nov 26th
Zone 9b	Jan 12th	Feb 2nd	Mar 29th – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

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

Culinary Notes

Chef's Note

Cimmaron’s tight upright head gives you that satisfying romaine snap without going tough, so it stands up to punchy dressings instead of collapsing. Use it where you want crunch first—wedge, Caesar-ish chop, or quick char—then let the sweetness and clean finish do the heavy lifting.

Best Uses

cold salads that need backbone—crisp Caesar-style chopping
wedge salads with thick dressing that clings without soaking
grilled or blistered romaine for char on the edges while staying snappy
fresh wraps where the crunch cuts through creamy sauces

Flavor Profile

cool, sweet vegetal flavor crisp romaine snap slightly tender bite at the core clean, refreshing finish

Kitchen Pairings

lemon juice Parmesan anchovy paste garlic olive oil chicken

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.