When to plant Lavender in Johnson County, AR
Plant Lavender in Johnson County, between April 2 and April 16 — the only viable window. Zone 8a's short season (222 frost-free days) rules out a fall crop.
When to Plant Lavender in Johnson County, AR
Top priorities for Johnson County, Arkansas gardeners in June
June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Johnson County, Arkansas.
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Collect lavender at their peak
If you can't use it all right away, check the food-preservation section of your planner.
July prep starts now
- First harvests: lavender
Lavender (Lavandula angustifolia) is a fragrant Mediterranean sub-shrub prized for its silver-gray foliage and intensely aromatic purple flower spikes. A classic companion for roses and an unmatched pollinator magnet, lavender thrives in the exact conditions that challenge many plants: poor, rocky, alkaline soil with excellent drainage and full sun. English lavender is the most cold-hardy species, reliably perennial in Zones 5–9. Fresh or dried flowers are widely used in sachets, essential oils, culinary applications, and dried arrangements.
Johnson County, Arkansas is in USDA Zone 8a. The average last spring frost is March 26 and the first fall frost is November 3, giving you a growing season of approximately 222 days.
At an elevation of 1,347 feet, Johnson County receives approximately 49.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Lavender during the growing season.
Johnson County Soil Profile
Soil Type
Silt Loam
Soil pH
5.3-7
Drainage
Well Drained
Lavender 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 Lavender's growing requirements.
Soil pH
Your soil pH (5.3–7.0) is more acidic than Lavender prefers (6.5–7.5). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Johnson County is excellent for Lavender — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Lavender.
How to Plant Lavender
Lavender Water Budget
Monthly Watering Guide for Lavender
Lavender needs approximately 0.3 inches of water per week (1.3" per month). Here's how your county's rainfall compares month by month.
| Month | Lavender Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.8" | 0" | ❄️ Dormant |
| Feb | — | 3.8" | 0" | ❄️ Dormant |
| Mar | 1.3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 3.6" | 0" | ✅ Rainfall sufficient |
| May | 1.3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Jun | 1.3" | 5" | 0" | ✅ Rainfall sufficient |
| Jul | 1.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Aug | 1.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Sep | 1.3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Oct | 1.3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Nov | 1.3" | 4.2" | 0" | ✅ Rainfall sufficient |
| Dec | — | 3.9" | 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.
Lavender 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.
Lavender Planting Timeline — Johnson County, AR
Lavender Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 22 | Jan 22 – Feb 5 |
| Transplant Outdoors | April 2 | Apr 2 – Apr 16 |
| Bloom | June 11 | Jun 11 – Sep 17 |
Plant 0.5" deep · 18" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.3"/week · Natural rainfall sufficient
📅 Days to Maturity
90–120 days
🧪 Soil pH
Needs 6.5–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 8a
📆 Growing Season
222 days in Johnson County
Growing Tips for Lavender in Johnson County
Direct sow Lavender outdoors after March 26 in Johnson County when soil has warmed and frost danger has passed.
General growing tips
The single most important requirement for lavender success is excellent drainage — it will rot in heavy clay or wet winter soils before cold alone kills it. Amend with coarse sand or fine gravel if needed; raised beds work well in Zones 5–6. Start from rooted cuttings or transplants rather than seed for named cultivars. Transplant after last frost when soil is reliably warm (55°F+). Avoid rich or overly moist soils. Prune lightly after each flush of bloom, but never cut into old wood below the green growth zone — it will not regenerate from leafless woody stems. In Zones 5–6, mulch lightly with gravel (not bark/organic material which traps moisture) around the crown for winter protection. Year 2+ plants develop into full, mature shrubs with the most prolific bloom.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Lavender in Other Locations
Frequently Asked Questions
When should I plant Lavender in Johnson County, AR?
Johnson County is in Zone 8a with an average last frost of March 26. Plan your Lavender planting based on this frost date — see the calendar above for exact timing.
What planting zone is Johnson County, AR?
Johnson County, Arkansas is in USDA Hardiness Zone 8a. The average last spring frost is March 26 and first fall frost is November 3.
When should I plant Lavender in Johnson County, AR?
In Johnson County, AR, plant Lavender after the last frost (around March 26) and before the first frost (around November 3). Best results when soil holds above 50°F.
What growing zone is Johnson County, AR for Lavender?
Johnson County sits in USDA Zone 8a. Lavender grows reliably in zones 5a through 9b, so it's a good fit here.
Can Lavender grow in Johnson County's climate?
Yes — Lavender grows well in Johnson County's temperate climate. Johnson County averages a 222-day frost-free season, with last frost around March 26 and first frost around November 3.
Your Johnson County Garden Planner — Free
A 22-page printable planner built for Johnson County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.