SproutSmart
SproutSmart™ Intelligent Garden Sowing

Crisp Mint

Lettuce
Zone 13b Save Garden

Planting Schedule

Add Crisp Mint to your garden to build a schedule and get reminders.
Botanical illustration of Crisp Mint
50d to harvest

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

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

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

Crop Dates

Growing note: In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 20th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity50
Sun RequirementsPart SunPartial sun
Growth HabitRosette
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)32
Harden Off (days)5

Today's Conditions

Outdoor planting for Crisp Mint in Zone 13b typically begins around 2026-10-01. Wait until soil reaches at least 40°F before transplanting Crisp Mint.

Garden Alerts

In frost-free Zone 13b, grow this cool-season crop during the cooler dry season (October–February).

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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.

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 40°F for reliable germination and early growth.

Expert Note

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

Botanical illustration of Crisp Mint

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.