When to plant Lettuce in Miami-Dade County, FL
Plant Lettuce in Miami-Dade County from December 11 to January 1 in spring. Miami-Dade County sits in USDA Zone 11a, with last frost around January 1 and first frost on December 31. A second sowing from November 5 to November 19 extends the harvest into fall.
When to Plant Lettuce in Miami-Dade County, FL
Miami-Dade County, Florida gardeners: here's your June plan
Here's what deserves your attention in Miami-Dade County, Florida this month. Everything below is tailored to Zone 11a and timed around your local frost dates.
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Survive, don't thrive
June-August is endurance gardening. Keep okra, peppers, sweet potatoes, and southern peas alive. Harvest everything daily before the heat damages produce on the vine.
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Start fall tomato seeds indoors
Yes, indoors — under lights or in AC. They'll be ready to transplant in August when temperatures briefly moderate.
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Add compost to empty beds
Empty beds get a thick layer of compost + mulch to suppress weeds and feed the soil for fall planting.
Lettuce is a fast-growing cool-season green available in leaf, romaine, butterhead, and crisphead types. It is the foundation of salads and one of the easiest crops to grow.
Miami-Dade County, Florida is in USDA Zone 11a. The average last spring frost is January 1 and the first fall frost is December 31, giving you a growing season of approximately 364 days.
At an elevation of 123 feet, Miami-Dade County receives approximately 58.7 inches of rainfall annually with predominantly sand soil. Summer highs average 90°F, providing good warmth for Lettuce during the growing season. Sandy soil warms quickly in spring — great for early planting — but Lettuce will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lettuce root diseases.
Miami-Dade County Soil Profile
Soil Type
Sand
Soil pH
5.1-6.3
Drainage
Well Drained
Soil Compatibility in Miami-Dade County
How your county's soil matches Lettuce's growing requirements.
Soil pH
Your soil pH (5.1–6.3) is more acidic than Lettuce prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Miami-Dade County warms quickly in spring but drains fast. Lettuce will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Lettuce.
Organic Matter
Organic matter is low (1.3%). Add 2-3 inches of compost before planting Lettuce.
How to Plant Lettuce
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Lettuce Water Budget
Monthly Watering Guide for Lettuce
Lettuce needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Lettuce Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 3" | 2.9" | 0.1" | 💧 Light watering |
| Feb | 3" | 2.9" | 0.1" | 💧 Light watering |
| Mar | 3" | 3.4" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 2.5" | 0.5" | 💧 Light watering |
| May | 3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 8.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 9.5" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 8.6" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 7.1" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 5" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 2.3" | 0.7" | 💧 Light watering |
| Dec | 3" | 2.7" | 0.3" | 💧 Light watering |
Water needs are for active growing months only (Jan–Dec in Miami-Dade County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Lettuce Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Lettuce Planting Timeline — Miami-Dade County, FL
Lettuce Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 4 | Dec 4 – Dec 18 |
| Transplant Outdoors | January 1 | Jan 1 – Jan 15 |
| Direct Sow | December 11 | Dec 11 – Jan 1 |
| Harvest | February 5 | Feb 5 – Apr 16 |
| Fall Sowing | November 5 | Nov 5 – Nov 19 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Transplant Outdoors Direct Sow |
| February | Harvest |
| March | Harvest |
| April | Harvest |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | — |
| November | Fall Sowing |
| December | Start Indoors Direct Sow |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · Only during dry spells
📅 Days to Maturity
30–60 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 11a
📆 Growing Season
365 days in Miami-Dade County
Growing Tips for Lettuce in Miami-Dade County
Sandy soil in Miami-Dade County dries quickly — mulch Lettuce with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your generous 365.0-day season in Miami-Dade County allows multiple plantings of Lettuce. Sow every 15.0 days for continuous harvest.
Common pests for Lettuce in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Sow seeds directly every 2 weeks for continuous harvest. Provide afternoon shade in warm weather to delay bolting. Harvest in the morning for crispest leaves.
Recommended Lettuce Varieties for Miami-Dade County
Bolt-resistant varieties for warm summers — grow as spring/fall crop
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Very easy to save. Let a few plants bolt each season.
Lettuce in Other Locations
Frequently Asked Questions
When should I plant Lettuce in Miami-Dade County, FL?
Miami-Dade County is in Zone 11a with an average last frost of January 1. Plan your Lettuce planting based on this frost date — see the calendar above for exact timing.
What planting zone is Miami-Dade County, FL?
Miami-Dade County, Florida is in USDA Hardiness Zone 11a. The average last spring frost is January 1 and first fall frost is December 31.
When should I plant Lettuce in Miami-Dade County, FL?
In Miami-Dade County, FL, plant Lettuce after the last frost (around January 1) and before the first frost (around December 31). Best results when soil holds above 50°F.
What growing zone is Miami-Dade County, FL for Lettuce?
Miami-Dade County sits in USDA Zone 11a. Lettuce grows reliably in zones 2a through 11b, so it's a good fit here.
Can Lettuce grow in Miami-Dade County's climate?
Yes — Lettuce grows well in Miami-Dade County's temperate climate. Miami-Dade County averages a 365-day frost-free season, with last frost around January 1 and first frost around December 31.
Your Miami-Dade County Garden Planner — Free
A 22-page printable planner built for Miami-Dade County (Zone 11a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.