When to Plant Lettuce in Guadalupe County, TX
Top priorities for Guadalupe County, Texas gardeners in May
May is a pivotal month for Guadalupe County, Texas gardens. Focus on these tasks first and you'll set up the rest of the season for success.
-
Harvest lettuce as they ripen
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Before June arrives, get these ready
- First harvests: lettuce
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.
Guadalupe County, Texas is in USDA Zone 9a. The average last spring frost is March 7 and the first fall frost is November 21, giving you a growing season of approximately 259 days.
At an elevation of 3,679 feet, Guadalupe County receives approximately 63 inches of rainfall annually with predominantly clay soil. Summer highs average 93°F, providing good warmth for Lettuce during the growing season. Clay soil retains moisture well for Lettuce, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lettuce root diseases.
Guadalupe County Soil Profile
Soil Type
Clay
Soil pH
6.9-8.2
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 Guadalupe County
How your county's soil matches Lettuce's growing requirements.
Soil pH
Your soil pH (6.9–8.2) is more alkaline than Lettuce prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
Your clay soil in Guadalupe County is workable for Lettuce. Add compost annually to improve structure.
Organic Matter
Organic matter is moderate (2.7%). 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 Sep 22 to harvest before frost.
For a dedicated fall crop, sow by Sep 26.
Plant 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 | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 2.1" | 0" | ❄️ Dormant |
| Mar | 3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 6.5" | 0" | ✅ Rainfall sufficient |
| May | 3" | 9.5" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 9.3" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 8" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 7.1" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 6.4" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 1.9" | 1.1" | 💧 Light watering |
| Dec | — | 1.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Guadalupe 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 — Guadalupe County, TX
Lettuce Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 7 | Feb 7 – Feb 21 |
| Transplant Outdoors | March 7 | Mar 7 – Mar 21 |
| Direct Sow | February 14 | Feb 14 – Mar 7 |
| Harvest | April 11 | Apr 11 – Jun 20 |
| Fall Sowing | September 26 | Sep 26 – Oct 10 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | Fall Sowing |
| 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: too_alkaline
🗺️ USDA Zone
Zone 9a
📆 Growing Season
259 days in Guadalupe County
Growing Tips for Lettuce in Guadalupe County
Direct sow Lettuce outdoors after March 07 in Guadalupe County when soil has warmed and frost danger has passed.
With Guadalupe County's clay soil (40% clay), work in 3-4 inches of compost before planting Lettuce. Avoid tilling when soil is wet to prevent compaction.
Summer highs in Guadalupe County reach 93°F — grow Lettuce as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 259.0-day season in Guadalupe 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 Guadalupe 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 Guadalupe County, TX?
Guadalupe County is in Zone 9a with an average last frost of March 7. Plan your Lettuce planting based on this frost date — see the calendar above for exact timing.
What planting zone is Guadalupe County, TX?
Guadalupe County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is March 7 and first fall frost is November 21.
Your Guadalupe County Garden Planner — Free
A 24-page printable planner built for Guadalupe County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.