When to Plant Spinach in Okmulgee County, OK
Your May game plan for Okmulgee County, Oklahoma
May is a pivotal month for Okmulgee County, Oklahoma gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Get spinach seeds going inside
These need a head start before your last frost (April 3). Sow into cells now so you're ready to transplant in a few weeks.
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Harvest spinach as they ripen
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
Looking ahead to June
- First harvests: spinach
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.
Okmulgee County, Oklahoma is in USDA Zone 7b. The average last spring frost is April 3 and the first fall frost is November 2, giving you a growing season of approximately 213 days.
At an elevation of 657 feet, Okmulgee County receives approximately 28.9 inches of rainfall annually with predominantly loam soil. Summer highs average 91°F, providing good warmth for Spinach during the growing season.
Okmulgee County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.6
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 Okmulgee County
How your county's soil matches Spinach's growing requirements.
Soil pH
Your soil pH (6.7–7.6) overlaps with Spinach's range (6.5–7.5), though not a perfect match.
Soil Texture
The loam soil in Okmulgee County is excellent for Spinach — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.3%) — Spinach will thrive.
How to Plant Spinach
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Spinach
Sow every 4 weeks. Last sowing by Sep 13 to harvest before frost.
For a dedicated fall crop, sow by Aug 24.
Plant Water Budget
Water stress score is 6/10 — 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 | — | 0.8" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1.9" | 0" | ❄️ Dormant |
| Apr | 3" | 3.5" | 0" | ✅ Rainfall sufficient |
| May | 3" | 4.2" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 3.3" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 2.5" | 0.5" | 💧 Light watering |
| Oct | 3" | 1.7" | 1.3" | 💧 Light watering |
| Nov | 3" | 1" | 2" | 🚿 Regular watering |
| Dec | — | 0.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Okmulgee 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 — Okmulgee County, OK
Spinach Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 27 | Feb 27 – Mar 13 |
| Transplant Outdoors | April 3 | Apr 3 – Apr 17 |
| Direct Sow | March 20 | Mar 20 – Apr 10 |
| Harvest | May 8 | May 8 – Jul 10 |
| Fall Sowing | August 24 | Aug 24 – Sep 7 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · Only during dry spells
📅 Days to Maturity
35–50 days
🧪 Soil pH
Needs 6.5–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 7b
📆 Growing Season
213 days in Okmulgee County
Growing Tips for Spinach in Okmulgee County
Direct sow Spinach outdoors after April 03 in Okmulgee County when soil has warmed and frost danger has passed.
Summer highs in Okmulgee County reach 91°F — grow Spinach as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 213.0-day season in Okmulgee 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 Okmulgee County
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
Frequently Asked Questions
When should I plant Spinach in Okmulgee County, OK?
Okmulgee County is in Zone 7b with an average last frost of April 3. Plan your Spinach planting based on this frost date — see the calendar above for exact timing.
What planting zone is Okmulgee County, OK?
Okmulgee County, Oklahoma is in USDA Hardiness Zone 7b. The average last spring frost is April 3 and first fall frost is November 2.
Your Okmulgee County Garden Planner — Free
A 24-page printable planner built for Okmulgee County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.