When to Plant Basil in Waller County, TX
May to-do list for Waller County, Texas
Your garden in Waller County, Texas is working on a schedule, even when you're not. Here's where you should be this May.
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Harvest basil as they ripen
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
To set up a strong June, finish these tasks
- First harvests: basil
Basil is a fragrant warm-season herb essential to Italian and Thai cuisines. It comes in many varieties including sweet, Thai, purple, and lemon types.
Waller County, Texas is in USDA Zone 9a. The average last spring frost is February 19 and the first fall frost is December 4, giving you a growing season of approximately 288 days.
At an elevation of 376 feet, Waller County receives approximately 64.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 95°F, so Basil may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Basil will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Basil root diseases.
Waller County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.6-6.2
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 Waller County
How your county's soil matches Basil's growing requirements.
Soil pH
Your soil pH (5.6–6.2) is more acidic than Basil prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Waller County warms quickly in spring but drains fast. Basil will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.0%). Annual compost additions will help Basil.
How to Plant Basil
Succession Planting Basil
Sow every 5.7 weeks. Last sowing by Sep 20 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Basil
Basil needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.
| Month | Basil Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.7" | 0" | ❄️ Dormant |
| Feb | 2.6" | 2.4" | 0.2" | 💧 Light watering |
| Mar | 2.6" | 4.6" | 0" | ✅ Rainfall sufficient |
| Apr | 2.6" | 7.3" | 0" | ✅ Rainfall sufficient |
| May | 2.6" | 8.9" | 0" | ✅ Rainfall sufficient |
| Jun | 2.6" | 9.1" | 0" | ✅ Rainfall sufficient |
| Jul | 2.6" | 7.9" | 0" | ✅ Rainfall sufficient |
| Aug | 2.6" | 7" | 0" | ✅ Rainfall sufficient |
| Sep | 2.6" | 6.9" | 0" | ✅ Rainfall sufficient |
| Oct | 2.6" | 4.3" | 0" | ✅ Rainfall sufficient |
| Nov | 2.6" | 2.2" | 0.4" | 💧 Light watering |
| Dec | 2.6" | 1.7" | 0.9" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in Waller County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Basil 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.
Basil Planting Timeline — Waller County, TX
Basil Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 8 | Jan 8 – Jan 22 |
| Transplant Outdoors | February 26 | Feb 26 – Mar 12 |
| Direct Sow | February 26 | Feb 26 – Mar 19 |
| Harvest | April 23 | Apr 23 – Jun 25 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.6"/week · Natural rainfall sufficient
📅 Days to Maturity
50–75 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
288 days in Waller County
Growing Tips for Basil in Waller County
Direct sow Basil outdoors after February 19 in Waller County when soil has warmed and frost danger has passed.
Sandy soil in Waller County dries quickly — mulch Basil with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
General growing tips
Start seeds indoors or direct sow after last frost. Pinch flower buds to extend leaf production. Harvest leaves from the top down, cutting just above a leaf pair.
Recommended Basil Varieties for Waller County
Downy mildew-resistant basil for your humid climate
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Isolate 150 ft between varieties. Different basil species can cross.
Basil in Other Locations
Frequently Asked Questions
When should I plant Basil in Waller County, TX?
Waller County is in Zone 9a with an average last frost of February 19. Plan your Basil planting based on this frost date — see the calendar above for exact timing.
What planting zone is Waller County, TX?
Waller County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 19 and first fall frost is December 4.
Your Waller County Garden Planner — Free
A 24-page printable planner built for Waller 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.