When to Plant Lettuce in Galveston County, TX
This month in Galveston County, Texas
If you only do a handful of things in the garden this May, make it these. They're sequenced around your zone's frost timing.
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It's harvest week for lettuce
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
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.
Galveston County, Texas is in USDA Zone 9b. The average last spring frost is February 5 and the first fall frost is December 7, giving you a growing season of approximately 305 days.
At an elevation of 9 feet, Galveston County receives approximately 72.5 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 100°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.
Galveston County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.7-6.5
Drainage
Well Drained
Plant 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 Galveston County
How your county's soil matches Lettuce's growing requirements.
Soil pH
Your soil pH (5.7–6.5) overlaps with Lettuce's range (6.0–7.0), though not a perfect match.
Soil Texture
Sandy soil in Galveston County warms quickly in spring but drains fast. Lettuce will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help 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 08 to harvest before frost.
For a dedicated fall crop, sow by Oct 12.
Plant 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 | — | 2.1" | 0" | ❄️ Dormant |
| Feb | 3" | 2.2" | 0.8" | 💧 Light watering |
| Mar | 3" | 5.4" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 8.2" | 0" | ✅ Rainfall sufficient |
| May | 3" | 10.4" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 10.9" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 8.7" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 8.6" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 6.2" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 5.2" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 2.6" | 0.4" | 💧 Light watering |
| Dec | 3" | 1.9" | 1.1" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in Galveston 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 — Galveston County, TX
Lettuce Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 8 | Jan 8 – Jan 22 |
| Transplant Outdoors | February 5 | Feb 5 – Feb 19 |
| Direct Sow | January 15 | Jan 15 – Feb 5 |
| Harvest | March 12 | Mar 12 – May 21 |
| Fall Sowing | October 12 | Oct 12 – Oct 26 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · Natural rainfall sufficient
📅 Days to Maturity
30–60 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 9b
📆 Growing Season
305 days in Galveston County
Growing Tips for Lettuce in Galveston County
Direct sow Lettuce outdoors after February 05 in Galveston County when soil has warmed and frost danger has passed.
Sandy soil in Galveston 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 Galveston County reach 100°F — grow Lettuce as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 306.0-day season in Galveston 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 Galveston 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 Galveston County, TX?
Galveston County is in Zone 9b with an average last frost of February 5. Plan your Lettuce planting based on this frost date — see the calendar above for exact timing.
What planting zone is Galveston County, TX?
Galveston County, Texas is in USDA Hardiness Zone 9b. The average last spring frost is February 5 and first fall frost is December 7.
Your Galveston County Garden Planner — Free
A 24-page printable planner built for Galveston County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.