When to Plant Lemon Balm in Johnson County, TX
Lemon balm is a vigorous perennial herb with bright green, lemon-scented leaves. It makes a refreshing tea and is easy to grow but can spread aggressively.
Johnson County, Texas is in USDA Zone 8a. The average last spring frost is March 18 and the first fall frost is November 12, giving you a growing season of approximately 239 days.
At an elevation of 2,525 feet, Johnson County receives approximately 62.8 inches of rainfall annually with predominantly clay soil. Summer highs average 92°F, providing good warmth for Lemon Balm during the growing season. Clay soil retains moisture well for Lemon Balm, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lemon Balm root diseases.
Johnson County Soil Profile
Soil Type
Clay
Soil pH
7-7.8
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 Johnson County
How your county's soil matches Lemon Balm's growing requirements.
Soil pH
Your soil pH (7.0–7.8) overlaps with Lemon Balm's range (5.5–7.5), though not a perfect match.
Soil Texture
Heavy clay soil (42% clay) in Johnson County compacts easily and drains slowly. Amend with compost and avoid working soil when wet.
Organic Matter
Organic matter is moderate (3.1%). Annual compost additions will help Lemon Balm.
How to Plant Lemon Balm
Succession Planting Lemon Balm
Sow every 6.9 weeks. Last sowing by Sep 03 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Lemon Balm
Lemon Balm needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Lemon Balm Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 2.2" | 0" | ❄️ Dormant |
| Mar | 2.2" | 4.4" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 7.2" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 8.1" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 11.5" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 7.5" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 6.9" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 6" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 3.6" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 2.1" | 0.1" | 💧 Light watering |
| Dec | — | 1.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Johnson County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Lemon Balm 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.
Lemon Balm Planting Timeline — Johnson County, TX
Lemon Balm Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 25 | Mar 25 – Apr 8 |
| Harvest | May 27 | May 27 – Jul 15 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | Transplant Outdoors |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
60–70 days
🧪 Soil pH
Needs 5.5–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 8a
📆 Growing Season
239 days in Johnson County
Growing Tips for Lemon Balm in Johnson County
Direct sow Lemon Balm outdoors after March 18 in Johnson County when soil has warmed and frost danger has passed.
With Johnson County's clay soil (42% clay), work in 3-4 inches of compost before planting Lemon Balm. Avoid tilling when soil is wet to prevent compaction.
With 63" of annual rainfall in Johnson County, ensure good drainage for Lemon Balm — excess moisture can promote root rot and fungal diseases.
General growing tips
Start from seed, cuttings, or divisions. Contain in pots or use barriers to prevent spreading. Harvest frequently to keep plants bushy and prevent flowering.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Lemon Balm in Other Locations
Frequently Asked Questions
When should I plant Lemon Balm in Johnson County, TX?
Johnson County is in Zone 8a with an average last frost of March 18. Plan your Lemon Balm planting based on this frost date — see the calendar above for exact timing.
What planting zone is Johnson County, TX?
Johnson County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 18 and first fall frost is November 12.
Plan Your Garden with Confidence
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