When to plant Ageratum in Santa Rosa County, FL
Plant Ageratum in Santa Rosa County, when soil hits 50°F — usually February 20. Continue planting through March 13 for the spring crop.
When to Plant Ageratum in Santa Rosa County, FL
Santa Rosa County, Florida gardeners: here's your July plan
Each item below is timed to Santa Rosa County, Florida's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Basket week: ageratum
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Looking ahead to August
- First harvests: ageratum
Ageratum (Ageratum houstonianum), the floss flower, produces clusters of fluffy, powder-puff blooms in the rare sky-blue and lavender tones difficult to find among warm-season annuals. Compact mounding habit makes it ideal as a front-of-border edging plant. Blooms from early summer through fall with minimal deadheading; heat and humidity tolerant once established.
Santa Rosa County, Florida is in USDA Zone 9a. The average last spring frost is March 6 and the first fall frost is November 21, giving you a growing season of approximately 260 days.
At an elevation of 104 feet, Santa Rosa County receives approximately 55 inches of rainfall annually with predominantly sand soil. Summer highs average 91°F, providing good warmth for Ageratum during the growing season. Sandy soil warms quickly in spring — great for early planting — but Ageratum will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Ageratum root diseases.
Santa Rosa County Soil Profile
Soil Type
Sand
Soil pH
5.1-5.8
Drainage
Well Drained
Ageratum 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 Santa Rosa County
How your county's soil matches Ageratum's growing requirements.
Soil pH
Your soil pH (5.1–5.8) is more acidic than Ageratum prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Santa Rosa County warms quickly in spring but drains fast. Ageratum will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Ageratum.
Organic Matter
Organic matter is low (1.7%). Add 2-3 inches of compost before planting Ageratum.
How to Plant Ageratum
Succession Planting Ageratum
Sow every 6.9 weeks. Last sowing by Sep 07 to harvest before frost.
Ageratum Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Ageratum
Ageratum needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Ageratum Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.9" | 0" | ❄️ Dormant |
| Feb | — | 3" | 0" | ❄️ Dormant |
| Mar | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Apr | 4.3" | 2.3" | 2" | 💧 Light watering |
| May | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Jun | 4.3" | 7.5" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 7.9" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 8.6" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 7.9" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Nov | 4.3" | 2" | 2.3" | 🚿 Regular watering |
| Dec | — | 2.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Santa Rosa County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Ageratum 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.
Ageratum Planting Timeline — Santa Rosa County, FL
Ageratum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 23 | Jan 23 – Feb 6 |
| Transplant Outdoors | February 20 | Feb 20 – Mar 6 |
| Direct Sow | February 20 | Feb 20 – Mar 13 |
| Bloom | April 17 | Apr 17 – Oct 2 |
· 8" apart · Rows 10" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
60–75 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
260 days in Santa Rosa County
Growing Tips for Ageratum in Santa Rosa County
Direct sow Ageratum outdoors after March 06 in Santa Rosa County when soil has warmed and frost danger has passed.
Sandy soil in Santa Rosa County dries quickly — mulch Ageratum with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Ageratum in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 6–8 weeks before last frost — do not cover seed; it needs light to germinate. Can be direct-sown after last frost once soil warms to 60°F. Transplant or thin to proper spacing after frost danger passes. Deadheading isn't strictly required but tidying spent clusters improves appearance. Provide consistent moisture; drought causes premature setting. Avoid deep shade — blooms best in full sun to light afternoon shade.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Ageratum in Other Locations
Frequently Asked Questions
When should I plant Ageratum in Santa Rosa County, FL?
Santa Rosa County is in Zone 9a with an average last frost of March 6. Plan your Ageratum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Santa Rosa County, FL?
Santa Rosa County, Florida is in USDA Hardiness Zone 9a. The average last spring frost is March 6 and first fall frost is November 21.
When should I plant Ageratum in Santa Rosa County, FL?
In Santa Rosa County, FL, plant Ageratum after the last frost (around March 6) and before the first frost (around November 21). Best results when soil holds above 50°F.
What growing zone is Santa Rosa County, FL for Ageratum?
Santa Rosa County sits in USDA Zone 9a. Ageratum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Ageratum grow in Santa Rosa County's climate?
Yes — Ageratum grows well in Santa Rosa County's temperate climate. Santa Rosa County averages a 260-day frost-free season, with last frost around March 6 and first frost around November 21.
Your Santa Rosa County Garden Planner — Free
A 22-page printable planner built for Santa Rosa County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.