When to plant Lettuce in Seffner,
For Seffner, gardeners: plant Lettuce January 4 through January 25 once soil reads 50°F. A second sowing from October 25 to November 8 extends the harvest into fall.
When to Plant Lettuce in Seffner, FL
Your June planting checklist for Seffner, FL
A quick June briefing for Seffner, FL gardeners — what's urgent, what's next, and what can wait.
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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.
Seffner, Florida is in USDA Zone 10a. The average last spring frost is January 25 and the first fall frost is December 20, giving you a growing season of approximately 329 days.
At an elevation of 63 feet, Hillsborough County receives approximately 54.4 inches of rainfall annually with predominantly sand soil. Summer highs average 98°F, so Lettuce may need afternoon shade and extra watering during peak heat. 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.
Seffner Soil Profile
Soil Type
Sand
Soil pH
4.9-5.9
Drainage
Well Drained
Lettuce Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Seffner
How your county's soil matches Lettuce's growing requirements.
Soil pH
Your soil pH (4.9–5.9) is more acidic than Lettuce prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Hillsborough 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 (1.5%). 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.
Succession Planting Lettuce
Sow every 3.4 weeks. Last sowing by Oct 21 to harvest before frost.
For a dedicated fall crop, sow by Oct 25.
Lettuce Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
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" | 2.3" | 0.7" | 💧 Light watering |
| Feb | 3" | 2.7" | 0.3" | 💧 Light watering |
| Mar | 3" | 2.9" | 0.1" | 💧 Light watering |
| Apr | 3" | 2.1" | 0.9" | 💧 Light watering |
| May | 3" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 8.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 8" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 8" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 7.7" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 2" | 1" | 💧 Light watering |
| Dec | 3" | 2.4" | 0.6" | 💧 Light watering |
Water needs are for active growing months only (Jan–Dec in Hillsborough 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 — Seffner, FL
Lettuce Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 28 | Dec 28 – Jan 11 |
| Transplant Outdoors | January 25 | Jan 25 – Feb 8 |
| Direct Sow | January 4 | Jan 4 – Jan 25 |
| Harvest | March 1 | Mar 1 – May 10 |
| Fall Sowing | October 25 | Oct 25 – Nov 8 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Transplant Outdoors Direct Sow |
| February | Transplant Outdoors |
| March | Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | Fall Sowing |
| December | Start Indoors |
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 10a
📆 Growing Season
329 days in Hillsborough County
Growing Tips for Lettuce in Seffner
Direct sow Lettuce outdoors after January 25 in Hillsborough County when soil has warmed and frost danger has passed.
Sandy soil in Hillsborough County dries quickly — mulch Lettuce with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Summer highs in Hillsborough County reach 98°F — grow Lettuce as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 330.0-day season in Hillsborough 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 Seffner
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
When should I plant Lettuce in Seffner, ?
In Seffner, , plant Lettuce after the last frost (around January 25) and before the first frost (around December 20). Best results when soil holds above 50°F.
What growing zone is Seffner, for Lettuce?
Seffner sits in USDA Zone 10a. Lettuce grows reliably in zones 2a through 11b, so it's a good fit here.
Can Lettuce grow in Seffner's climate?
Yes — Lettuce grows well in Seffner's temperate climate. Seffner averages a 330-day frost-free season, with last frost around January 25 and first frost around December 20.
Your Hillsborough County Garden Planner — Free
A 22-page printable planner built for Hillsborough County (Zone 10a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.