When to plant Thyme in Monterey County, CA
In Monterey County, Thyme is a single-season spring crop — there's no second fall window. Plant March 20–April 3 for an 70–90-day harvest, finishing well before the November 17 first frost.
When to Plant Thyme in Monterey County, CA
July in Monterey County, California — your action list
A quick July briefing for Monterey County, California gardeners — what's urgent, what's next, and what can wait.
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Basket week: thyme
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
Thyme is a low-growing perennial herb with tiny, aromatic leaves and a warm, earthy flavor. It is one of the most versatile culinary and medicinal herbs.
Monterey County, California is in USDA Zone 9b. The average last spring frost is March 13 and the first fall frost is November 17, giving you a growing season of approximately 249 days.
At an elevation of 260 feet, Monterey County receives approximately 12.5 inches of rainfall annually with predominantly loam soil. Summer highs average 93°F, providing good warmth for Thyme during the growing season. With low rainfall, drip irrigation is essential for growing Thyme successfully. Mulch heavily to conserve soil moisture.
Monterey County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.2
Drainage
Well Drained
Thyme 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 Monterey County
How your county's soil matches Thyme's growing requirements.
Soil pH
Your soil pH (6.7–7.2) is within Thyme's preferred range (6.0–8.0).
Soil Texture
The loam soil in Monterey County is excellent for Thyme — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.7%). Annual compost additions will help Thyme.
How to Plant Thyme
Succession Planting Thyme
Sow every 8 weeks. Last sowing by Aug 19 to harvest before frost.
Thyme Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Thyme
Thyme 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 | Thyme Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.7" | 0" | ❄️ Dormant |
| Feb | — | 2.6" | 0" | ❄️ Dormant |
| Mar | 1.3" | 2.1" | 0" | ✅ Rainfall sufficient |
| Apr | 1.3" | 1" | 0.3" | 💧 Light watering |
| May | 1.3" | 0.3" | 1" | 🚿 Regular watering |
| Jun | 1.3" | 0.1" | 1.2" | 🚿 Regular watering |
| Jul | 1.3" | 0" | 1.3" | 🚿 Regular watering |
| Aug | 1.3" | 0" | 1.3" | 🚿 Regular watering |
| Sep | 1.3" | 0.1" | 1.2" | 🚿 Regular watering |
| Oct | 1.3" | 0.5" | 0.8" | 🚿 Regular watering |
| Nov | 1.3" | 1.2" | 0.1" | 💧 Light watering |
| Dec | — | 1.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Monterey County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Thyme 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.
Thyme Planting Timeline — Monterey County, CA
Thyme Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 20 | Mar 20 – Apr 3 |
| Harvest | May 29 | May 29 – Jul 31 |
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
Full Sun (6-8+ hours)
💧 Water
0.3"/week · Only during dry spells
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–8 · Your soil: ideal
🗺️ USDA Zone
Zone 9b
📆 Growing Season
249 days in Monterey County
Growing Tips for Thyme in Monterey County
Direct sow Thyme outdoors after March 13 in Monterey County when soil has warmed and frost danger has passed.
General growing tips
Start from seed, cuttings, or divisions. Plant in well-drained, lean soil. Prune lightly after flowering. Replace plants every 3-4 years when they become woody.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Thyme in Other Locations
Frequently Asked Questions
When should I plant Thyme in Monterey County, CA?
Monterey County is in Zone 9b with an average last frost of March 13. Plan your Thyme planting based on this frost date — see the calendar above for exact timing.
What planting zone is Monterey County, CA?
Monterey County, California is in USDA Hardiness Zone 9b. The average last spring frost is March 13 and first fall frost is November 17.
When should I plant Thyme in Monterey County, CA?
In Monterey County, CA, plant Thyme after the last frost (around March 13) and before the first frost (around November 17). Best results when soil holds above 50°F.
What growing zone is Monterey County, CA for Thyme?
Monterey County sits in USDA Zone 9b. Thyme grows reliably in zones 4a through 9b, so it's a good fit here.
Can Thyme grow in Monterey County's climate?
Yes — Thyme grows well in Monterey County's temperate climate. Monterey County averages a 249-day frost-free season, with last frost around March 13 and first frost around November 17.
Your Monterey County Garden Planner — Free
A 22-page printable planner built for Monterey 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.