Crisp Mint

Lettuce

Zone 4b Save Garden

🌱 50d to harvest Rosette

Cool, crisp leaves with a bright mint-green glow—Crisp Mint Romaine delivers a satisfyingly snappy bite and a clean, refreshing f…

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	May 13th
Transplant / Sow Outdoors	May 13th
Harvest Begins	Jul 2nd
Harvest Ends	Sep 27th

Crop Details

Trait	Value
Days to Maturity	50
Sun Requirements	Part Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	32
Harden Off (days)	5

Recommended Companions

Siberian Garlic Garlic

Frequently Asked Questions

What pest or disease is most likely to affect Lactuca sativa (crisp mint), and how can I treat it?

Watch for slugs and snails, especially in humid conditions, which chew ragged holes in lettuce leaves. Hand-pick at dusk, remove hiding spots, and use a physical barrier (copper tape around beds/containers) or slug bait that’s labeled for edible crops. If you see yellowing with a fuzzy gray/white growth at the crown, improve airflow, avoid overhead watering, and remove infected plants to reduce spread.

How often should I water crisp mint lettuce during its main growth phase to keep leaves crisp?

During the 30–45 days leading up to harvest, keep the top 1 inch of soil consistently moist but never waterlogged. Water when the surface starts to dry, typically about 1–2 times per week depending on heat and container size, and water early so leaves dry quickly. Uneven moisture causes bitterness and a tougher texture in Lactuca sativa.

How do I know crisp mint lettuce is ready to harvest?

Harvest when heads (or rosettes) reach a usable size and the outer leaves feel firm rather than limp; for Lactuca sativa this is commonly around day 50. Cut outer leaves for a longer window of picking, or harvest the whole plant at the first sign of fast bolting (flower stalk forming). Avoid waiting until leaves look overly loose or the plant starts stretching upward.

Cool, crisp leaves with a bright mint-green glow—Crisp Mint Romaine delivers a satisfyingly snappy bite and a clean, refreshing flavor that feels as crisp as it looks. At maturity in about 50 days, it forms an upright, tightly held head with tender, succulent texture from the center outward. Ideal for fresh salads and vibrant garnishes, Crisp Mint stays crisp and visually appealing, making it a standout choice for gardeners who love dependable, garden-fresh crunch.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 32°F before moving outdoors. Harden off for 5 days first.

Expert Note

For crisp romaine heads, keep plants cool and consistently watered—avoid letting them dry out or overheat to reduce bitterness and bolting.