When to plant Spinach in Captiva, FL
Captiva's spring Spinach window runs January 7 through January 28. aim for a steady week of warm soil before planting. A second sowing from October 24 to November 7 extends the harvest into fall.
When to Plant Spinach in Captiva, FL
Top priorities for Lee County, Florida gardeners in June
Your Lee County, Florida garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.
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Survive, don't thrive
June-August is endurance gardening. Keep okra, peppers, sweet potatoes, and southern peas alive. Harvest everything daily before the heat damages produce on the vine.
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Start fall tomato seeds indoors
Yes, indoors — under lights or in AC. They'll be ready to transplant in August when temperatures briefly moderate.
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Add compost to empty beds
Empty beds get a thick layer of compost + mulch to suppress weeds and feed the soil for fall planting.
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.
Captiva, Florida is in USDA Zone 10b. The average last spring frost is January 28 and the first fall frost is December 19, giving you a growing season of approximately 325 days.
At an elevation of 408 feet, Lee County receives approximately 61.6 inches of rainfall annually with predominantly sand soil. Summer highs average 86°F, providing good warmth for Spinach during the growing season. Sandy soil warms quickly in spring — great for early planting — but Spinach will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Spinach root diseases.
Captiva Soil Profile
Soil Type
Sand
Soil pH
5.1-5.9
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 Captiva
How your county's soil matches Spinach's growing requirements.
Soil pH
Your soil pH (5.1–5.9) is more acidic than Spinach prefers (6.5–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Lee County warms quickly in spring but drains fast. Spinach will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Spinach.
Organic Matter
Organic matter is low (1.4%). Add 2-3 inches of compost before planting 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 30 to harvest before frost.
For a dedicated fall crop, sow by Oct 24.
Spinach Water Budget
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" | 3" | 0" | ✅ Rainfall sufficient |
| Feb | 3" | 3.3" | 0" | ✅ Rainfall sufficient |
| Mar | 3" | 3.6" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 2.8" | 0.2" | 💧 Light watering |
| May | 3" | 4" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 7.6" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 10" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 7.7" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 9.3" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 5.1" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 2.7" | 0.3" | 💧 Light watering |
| Dec | 3" | 2.5" | 0.5" | 💧 Light watering |
Water needs are for active growing months only (Jan–Dec in Lee 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 — Captiva, FL
Spinach Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 31 | Dec 31 – Jan 14 |
| Transplant Outdoors | January 28 | Jan 28 – Feb 11 |
| Direct Sow | January 7 | Jan 7 – Jan 28 |
| Harvest | March 4 | Mar 4 – May 6 |
| Fall Sowing | October 24 | Oct 24 – Nov 7 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Transplant Outdoors Direct Sow |
| February | Transplant Outdoors |
| March | Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | Fall Sowing |
| December | Start Indoors |
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: too_acidic
🗺️ USDA Zone
Zone 10b
📆 Growing Season
325 days in Lee County
Growing Tips for Spinach in Captiva
Direct sow Spinach outdoors after January 28 in Lee County when soil has warmed and frost danger has passed.
Sandy soil in Lee County dries quickly — mulch Spinach with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your generous 326.0-day season in Lee 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 Captiva
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 Captiva, FL?
In Captiva, FL, plant Spinach after the last frost (around January 28) and before the first frost (around December 19). Best results when soil holds above 50°F.
What growing zone is Captiva, FL for Spinach?
Captiva sits in USDA Zone 10b. Spinach grows reliably in zones 2a through 10b, so it's a good fit here.
Can Spinach grow in Captiva's climate?
Yes — Spinach grows well in Captiva's temperate climate. Captiva averages a 326-day frost-free season, with last frost around January 28 and first frost around December 19.
Your Lee County Garden Planner — Free
A 22-page printable planner built for Lee County (Zone 10b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.