Frost Dates for Key Largo, FL 33037

Last spring frost Frost-free zone · First fall frost Frost-free zone · 365 frost-free days · USDA Zone 11a

Frost probability for 33037

Frost10%50%90%
Spring (last frost)January 25——
Fall (first frost)January 5——

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (25.2 km away); the 50% date is the median year.

Month by month in Key Largo

MonthWhat to do
JanuaryPlant cool-season crops: lettuce, spinach, broccoli, peas, and carrots.
FebruaryDirect sow brassicas and root vegetables. Start warm-season seedlings indoors.
MarchTransplant warm-season crops outdoors. Sow beans, cucumbers, and squash.
AprilMain warm-season planting window. Direct sow melons and sweet corn.
MaySuccession plant lettuce. Keep beds irrigated as temperatures climb.
JuneMonitor for heat stress. Harvest zucchini and cucumbers frequently.
JulyHarvest regularly to encourage continued production. Watch for pests.
AugustStart fall cool-season crops: broccoli, kale, beets, and carrots.
SeptemberPlant fall lettuce, spinach, arugula, and radishes.
OctoberHarvest mature crops. Direct sow cold-tolerant greens.
NovemberPlant garlic and onion sets. Harvest cool-season crops through the month.
DecemberPlant cool-season crops for winter harvest. Plan next year's garden.

What grows in a 365-day season

Frequently Asked Questions

What is the last frost date for Key Largo, FL (ZIP 33037)?

Key Largo, FL is frost-free in most years, so there's no last spring frost date to plan around.

What is the first fall frost date in Key Largo, FL?

Key Largo, FL is frost-free in most years, so there's no first fall frost date to plan around.

How long is the growing season in Key Largo, FL?

The frost-free growing season in Key Largo is year-round. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Key Largo, FL?

Based on frost date patterns, Key Largo falls approximately in 11a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Key Largo, FL?

Key Largo is a frost-free zone, so you can start tomatoes and transplant at any time of year. Focus on heat management rather than frost timing.

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