When to plant Spinach in Exeter, CA
For Exeter, gardeners: plant Spinach January 27 through February 17 once soil reads 50°F. A second sowing from October 8 to October 22 extends the harvest into fall.
When to Plant Spinach in Exeter, CA
August to-do list for Tulare County, California
We've pulled the most time-sensitive tasks for Tulare County, California this August and put them front and centre. Tackle them in order.
Spinach is a nutrient-packed cool-season green that grows quickly in spring and fall. It is rich in iron, vitamins, and antioxidants and excellent raw or cooked.
Exeter, California is in USDA Zone 9b. The average last spring frost is February 17 and the first fall frost is December 3, giving you a growing season of approximately 289 days.
At an elevation of 5,836 feet, Tulare County receives approximately 18.4 inches of rainfall annually with predominantly loam soil. Summer highs average 95°F, so Spinach may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Spinach successfully. Mulch heavily to conserve soil moisture.
Exeter Soil Profile
Soil Type
Loam
Soil pH
5.9-7.2
Drainage
Well Drained
Spinach 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 Exeter
How your county's soil matches Spinach's growing requirements.
Soil pH
Your soil pH (5.9–7.2) overlaps with Spinach's range (6.5–7.5), though not a perfect match.
Soil Texture
The loam soil in Tulare County is excellent for Spinach — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Spinach.
How to Plant Spinach
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Spinach
Sow every 4 weeks. Last sowing by Oct 14 to harvest before frost.
For a dedicated fall crop, sow by Oct 08.
Spinach Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Spinach
Spinach needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Spinach Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.6" | 0" | ❄️ Dormant |
| Feb | 3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Mar | 3" | 3" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 1.5" | 1.5" | 🚿 Regular watering |
| May | 3" | 0.5" | 2.5" | 🚿 Regular watering |
| Jun | 3" | 0.1" | 2.9" | 🚿 Regular watering |
| Jul | 3" | 0" | 3" | 🚿 Regular watering |
| Aug | 3" | 0" | 3" | 🚿 Regular watering |
| Sep | 3" | 0.2" | 2.8" | 🚿 Regular watering |
| Oct | 3" | 0.7" | 2.3" | 🚿 Regular watering |
| Nov | 3" | 1.7" | 1.3" | 💧 Light watering |
| Dec | 3" | 3.4" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Feb–Dec in Tulare County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Spinach 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.
Spinach Planting Timeline — Exeter, CA
Spinach Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 20 | Jan 20 – Feb 3 |
| Transplant Outdoors | February 17 | Feb 17 – Mar 3 |
| Direct Sow | January 27 | Jan 27 – Feb 17 |
| Harvest | March 24 | Mar 24 – May 26 |
| Fall Sowing | October 8 | Oct 8 – Oct 22 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Start Indoors Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · 1-2 times/week
📅 Days to Maturity
35–50 days
🧪 Soil pH
Needs 6.5–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 9b
📆 Growing Season
289 days in Tulare County
Growing Tips for Spinach in Exeter
Direct sow Spinach outdoors after February 17 in Tulare County when soil has warmed and frost danger has passed.
Summer highs in Tulare County reach 95°F — grow Spinach as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 290.0-day season in Tulare County allows multiple plantings of Spinach. Sow every 17.0 days for continuous harvest.
General growing tips
Direct sow as soon as soil can be worked in spring. Plant in partial shade for summer crops to delay bolting. Succession plant every 2 weeks for continuous harvest.
Recommended Spinach Varieties for Exeter
Slow-bolting spinach for warm springs — best as fall crop here
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Wind pollinated — isolate 1/2 mile for purity. Easy to let bolt in heat.
Spinach in Other Locations
When should I plant Spinach in Exeter, CA?
In Exeter, CA, plant Spinach after the last frost (around February 17) and before the first frost (around December 3). Best results when soil holds above 50°F.
What growing zone is Exeter, CA for Spinach?
Exeter sits in USDA Zone 9b. Spinach grows reliably in zones 2a through 10b, so it's a good fit here.
Can Spinach grow in Exeter's climate?
Yes — Spinach grows well in Exeter's temperate climate. Exeter averages a 290-day frost-free season, with last frost around February 17 and first frost around December 3.
Your Tulare County Garden Planner — Free
A 22-page printable planner built for Tulare 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.