When to Plant Chervil in Shasta County, CA
Your April planting checklist for Shasta County, California
Welcome to April in Zone 9a. These are the moves that will have the biggest impact on your growing season.
To set up a strong May, finish these tasks
- Transplants going out: chervil
- Direct-sowing: chervil
Chervil is a delicate herb with a subtle anise-parsley flavor, essential in French cuisine as part of fines herbes. It prefers cool conditions and partial shade.
Shasta County, California is in USDA Zone 8b. The average last spring frost is June 6 and the first fall frost is September 21, giving you a growing season of approximately 107 days.
At an elevation of 81 feet, Shasta County receives approximately 40.5 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 85°F, providing good warmth for Chervil during the growing season. Sandy soil warms quickly in spring — great for early planting — but Chervil will need more frequent watering and organic matter to retain nutrients.
Shasta County Soil Profile
Soil Type
Sandy Loam
Soil pH
5.7-6.8
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 Shasta County
How your county's soil matches Chervil's growing requirements.
Soil pH
Your soil pH (5.7–6.8) overlaps with Chervil's range (6.0–7.0), though not a perfect match.
Soil Texture
Sandy soil in Shasta County warms quickly in spring but drains fast. Chervil will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Chervil.
How to Plant Chervil
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Chervil
Sow every 4.6 weeks. Last sowing by Jul 23 to harvest before frost.
For a dedicated fall crop, sow by Jul 27.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Chervil
Chervil 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 | Chervil Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 7.7" | 0" | ❄️ Dormant |
| Feb | — | 8" | 0" | ❄️ Dormant |
| Mar | — | 6.8" | 0" | ❄️ Dormant |
| Apr | — | 3.2" | 0" | ❄️ Dormant |
| May | — | 1" | 0" | ❄️ Dormant |
| Jun | 2.2" | 0.2" | 2" | 🚿 Regular watering |
| Jul | 2.2" | 0" | 2.2" | 🚿 Regular watering |
| Aug | 2.2" | 0" | 2.2" | 🚿 Regular watering |
| Sep | 2.2" | 0.4" | 1.8" | 🚿 Regular watering |
| Oct | — | 1.6" | 0" | ❄️ Dormant |
| Nov | — | 4.4" | 0" | ❄️ Dormant |
| Dec | — | 7.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Jun–Sep in Shasta County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Chervil 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.
Chervil Planting Timeline — Shasta County, CA
Chervil Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | May 2 | May 2 – May 16 |
| Transplant Outdoors | May 30 | May 30 – Jun 13 |
| Direct Sow | May 23 | May 23 – Jun 13 |
| Harvest | July 11 | Jul 11 – Sep 12 |
| Fall Sowing | July 13 | Jul 13 – Jul 27 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Start Indoors Transplant Outdoors Direct Sow |
| June | Transplant Outdoors Direct Sow |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
40–60 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8b
📆 Growing Season
107 days in Shasta County
Growing Tips for Chervil in Shasta County
Direct sow Chervil outdoors after June 06 in Shasta County when soil has warmed and frost danger has passed.
Sandy soil in Shasta County dries quickly — mulch Chervil with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Chervil in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow in early spring or fall as chervil bolts in heat. Provide shade and cool conditions. Harvest outer leaves as needed; use fresh as it loses flavor when dried.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Chervil in Other Locations
Frequently Asked Questions
When should I plant Chervil in Shasta County, CA?
Shasta County is in Zone 8b with an average last frost of June 6. Plan your Chervil planting based on this frost date — see the calendar above for exact timing.
What planting zone is Shasta County, CA?
Shasta County, California is in USDA Hardiness Zone 8b. The average last spring frost is June 6 and first fall frost is September 21.
Your Shasta County Garden Planner — Free
A 24-page printable planner built for Shasta County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.