When to plant Geraniums in Captiva, FL
Captiva's 326-day season only supports one Geraniums planting per year. Sow between December 10 and December 24 for the best chance at full maturity before December 19.
When to Plant Geraniums in Captiva, FL
Your August gardening checklist
August is a pivotal month for Lee County, Florida gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Harvest geraniums as they ripen
If you can't use it all right away, check the food-preservation section of your planner.
Before September arrives, get these ready
- First harvests: geraniums
Geraniums (Pelargonium × hortorum) are tender perennials grown as warm-season annuals throughout North America. Prized for their bold flower clusters, long bloom period, and tolerance of summer heat when planted in well-drained soil, they anchor window boxes, containers, and bed borders from late spring until hard frost. Zones 9b–11b can overwinter plants in the ground.
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 Geraniums during the growing season. Sandy soil warms quickly in spring — great for early planting — but Geraniums will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Geraniums root diseases.
Captiva Soil Profile
Soil Type
Sand
Soil pH
5.1-5.9
Drainage
Well Drained
Geraniums 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 Geraniums's growing requirements.
Soil pH
Your soil pH (5.1–5.9) is more acidic than Geraniums 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. Geraniums will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Geraniums.
Organic Matter
Organic matter is low (1.4%). Add 2-3 inches of compost before planting Geraniums.
How to Plant Geraniums
Succession Planting Geraniums
Sow every 8 weeks. Last sowing by Sep 10 to harvest before frost.
Geraniums Water Budget
Monthly Watering Guide for Geraniums
Geraniums needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Geraniums Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 4.3" | 3" | 1.3" | 💧 Light watering |
| Feb | 4.3" | 3.3" | 1" | 💧 Light watering |
| Mar | 4.3" | 3.6" | 0.7" | 💧 Light watering |
| Apr | 4.3" | 2.8" | 1.5" | 💧 Light watering |
| May | 4.3" | 4" | 0.3" | 💧 Light watering |
| Jun | 4.3" | 7.6" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 10" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 7.7" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 9.3" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 5.1" | 0" | ✅ Rainfall sufficient |
| Nov | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Dec | 4.3" | 2.5" | 1.8" | 💧 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.
Geraniums 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.
Geraniums Planting Timeline — Captiva, FL
Geraniums Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | November 19 | Nov 19 – Dec 3 |
| Transplant Outdoors | December 10 | Dec 10 – Dec 24 |
| Bloom | February 18 | Feb 18 – Oct 14 |
Plant 0.1" deep · 14" apart · Rows 16" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Bloom |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | Start Indoors |
| December | Start Indoors Transplant Outdoors |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
70–100 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 10b
📆 Growing Season
325 days in Lee County
Growing Tips for Geraniums in Captiva
Direct sow Geraniums outdoors after January 28 in Lee County when soil has warmed and frost danger has passed.
Sandy soil in Lee County dries quickly — mulch Geraniums with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
General growing tips
Start seeds indoors 10–12 weeks before last frost — germination is slow and erratic without bottom heat (70–75°F). Transplant after frost danger passes. Geraniums rarely direct-sown; cuttings or transplants are the standard. Deadhead spent umbels weekly to maintain continuous bloom. Let soil dry slightly between waterings to prevent root rot. In zones 10–11 plants may be left in ground year-round or overwintered as houseplants.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Geraniums in Other Locations
When should I plant Geraniums in Captiva, FL?
In Captiva, FL, plant Geraniums 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 Geraniums?
Captiva sits in USDA Zone 10b. Geraniums grows reliably in zones 2a through 11b, so it's a good fit here.
Can Geraniums grow in Captiva's climate?
Yes — Geraniums 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.