When to plant Leeks in Captiva, FL
Spring Leeks in Captiva goes in January 7–January 28, once nighttime temps stop dipping near freezing. A second sowing from October 24 to November 7 extends the harvest into fall.
When to Plant Leeks in Captiva, FL
Lee County, Florida gardeners: here's your June plan
Here's what deserves your attention in Lee County, Florida this month. Everything below is tailored to Zone 10b and timed around your local frost dates.
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Bring in the leeks
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
July will be here before you know it — start on
- First harvests: leeks
Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.
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 Leeks during the growing season. Sandy soil warms quickly in spring — great for early planting — but Leeks will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Leeks root diseases.
Captiva Soil Profile
Soil Type
Sand
Soil pH
5.1-5.9
Drainage
Well Drained
Leeks 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 Leeks's growing requirements.
Soil pH
Your soil pH (5.1–5.9) is more acidic than Leeks prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Lee County warms quickly in spring but drains fast. Leeks will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Leeks.
Organic Matter
Organic matter is low (1.4%). Add 2-3 inches of compost before planting Leeks.
How to Plant Leeks
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Leeks Water Budget
Monthly Watering Guide for Leeks
Leeks needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.
| Month | Leeks Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 3.5" | 3" | 0.5" | 💧 Light watering |
| Feb | 3.5" | 3.3" | 0.2" | 💧 Light watering |
| Mar | 3.5" | 3.6" | 0" | ✅ Rainfall sufficient |
| Apr | 3.5" | 2.8" | 0.7" | 💧 Light watering |
| May | 3.5" | 4" | 0" | ✅ Rainfall sufficient |
| Jun | 3.5" | 7.6" | 0" | ✅ Rainfall sufficient |
| Jul | 3.5" | 10" | 0" | ✅ Rainfall sufficient |
| Aug | 3.5" | 7.7" | 0" | ✅ Rainfall sufficient |
| Sep | 3.5" | 9.3" | 0" | ✅ Rainfall sufficient |
| Oct | 3.5" | 5.1" | 0" | ✅ Rainfall sufficient |
| Nov | 3.5" | 2.7" | 0.8" | 💧 Light watering |
| Dec | 3.5" | 2.5" | 1" | 💧 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.
Leeks 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.
Leeks Planting Timeline — Captiva, FL
Leeks 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 | April 29 | Apr 29 – Jul 15 |
| Fall Sowing | October 24 | Oct 24 – Nov 7 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Transplant Outdoors Direct Sow |
| February | Transplant Outdoors |
| March | — |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | Fall Sowing |
| November | Fall Sowing |
| December | Start Indoors |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.8"/week · Only during dry spells
📅 Days to Maturity
90–150 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 10b
📆 Growing Season
325 days in Lee County
Growing Tips for Leeks in Captiva
Direct sow Leeks outdoors after January 28 in Lee County when soil has warmed and frost danger has passed.
Sandy soil in Lee County dries quickly — mulch Leeks with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Leeks in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Leeks in Other Locations
When should I plant Leeks in Captiva, FL?
In Captiva, FL, plant Leeks 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 Leeks?
Captiva sits in USDA Zone 10b. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Captiva's climate?
Yes — Leeks 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.