When to plant Zinnia in Sharpes, FL
Plant Zinnia in Sharpes from December 8 to December 29 in spring. Sharpes sits in USDA Zone 10a, with last frost around January 19 and first frost on December 20.
When to Plant Zinnia in Sharpes, FL
August in the garden — Brevard County, Florida
Each item below is timed to Brevard County, Florida's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Pick zinnia
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
Zinnia (Zinnia elegans) is a fast-growing, heat-loving annual that produces bold, dahlia-like blooms from early summer until hard frost. One of the easiest flowers to grow from direct-sown seed, zinnias thrive in hot, dry conditions and are magnets for butterflies and beneficial insects. They make excellent companion plants alongside marigolds in the vegetable garden.
Sharpes, Florida is in USDA Zone 10a. The average last spring frost is January 19 and the first fall frost is December 20, giving you a growing season of approximately 335 days.
At an elevation of 491 feet, Brevard County receives approximately 52.7 inches of rainfall annually with predominantly sand soil. Summer highs average 104°F, so Zinnia may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Zinnia will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Zinnia root diseases.
Sharpes Soil Profile
Soil Type
Sand
Soil pH
4.8-5.9
Drainage
Well Drained
Zinnia 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 Sharpes
How your county's soil matches Zinnia's growing requirements.
Soil pH
Your soil pH (4.8–5.9) is more acidic than Zinnia prefers (5.5–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Brevard County warms quickly in spring but drains fast. Zinnia will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Zinnia.
Organic Matter
Organic matter is low (1.6%). Add 2-3 inches of compost before planting Zinnia.
How to Plant Zinnia
Succession Planting Zinnia
Sow every 6.9 weeks. Last sowing by Oct 11 to harvest before frost.
Zinnia Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Zinnia
Zinnia needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Zinnia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 2.2" | 2.2" | 0" | ✅ Rainfall sufficient |
| Feb | 2.2" | 3.1" | 0" | ✅ Rainfall sufficient |
| Mar | 2.2" | 3.5" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 2.5" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 7.5" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 6.6" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 6.8" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 7.6" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 5" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 1.9" | 0.3" | 💧 Light watering |
| Dec | 2.2" | 2.3" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Jan–Dec in Brevard County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Zinnia 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.
Zinnia Planting Timeline — Sharpes, FL
Zinnia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 22 | Dec 22 – Jan 5 |
| Transplant Outdoors | December 8 | Dec 8 – Dec 22 |
| Direct Sow | December 8 | Dec 8 – Dec 29 |
| Bloom | February 16 | Feb 16 – Aug 31 |
Plant 0.3" deep · 12" apart · Rows 18" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Bloom |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | — |
| October | — |
| November | — |
| December | Start Indoors Transplant Outdoors Direct Sow |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
60–70 days
🧪 Soil pH
Needs 5.5–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 10a
📆 Growing Season
335 days in Brevard County
Growing Tips for Zinnia in Sharpes
Direct sow Zinnia outdoors after January 19 in Brevard County when soil has warmed and frost danger has passed.
Sandy soil in Brevard County dries quickly — mulch Zinnia with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 104°F in Brevard County, provide afternoon shade for Zinnia and water deeply in the morning.
Common pests for Zinnia in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct-sow after last frost when soil reaches 60°F; seeds germinate in 5-7 days. In zones 3-5 a brief indoor start (4 weeks) is worthwhile but transplant carefully — zinnias dislike root disturbance. Deadhead frequently to extend bloom. Excellent cut flower; harvesting regularly encourages branching. Avoid overhead watering to reduce powdery mildew.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Zinnia in Other Locations
When should I plant Zinnia in Sharpes, FL?
In Sharpes, FL, plant Zinnia after the last frost (around January 19) and before the first frost (around December 20). Best results when soil holds above 50°F.
What growing zone is Sharpes, FL for Zinnia?
Sharpes sits in USDA Zone 10a. Zinnia grows reliably in zones 3a through 11b, so it's a good fit here.
Can Zinnia grow in Sharpes's climate?
Yes — Zinnia grows well in Sharpes's temperate climate. Sharpes averages a 336-day frost-free season, with last frost around January 19 and first frost around December 20.
Your Brevard County Garden Planner — Free
A 22-page printable planner built for Brevard County (Zone 10a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.