When to plant Ageratum in Bibb County County,
Plant Ageratum in Bibb County County from March 7 to March 28 in spring. Bibb County County sits in USDA Zone 8a, with last frost around March 14 and first frost on November 13.
When to Plant Ageratum in Bibb County, AL
Your June gardening checklist
Your garden in Bibb County, Alabama is working on a schedule, even when you're not. Here's where you should be this June.
-
It's harvest week for ageratum
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
July prep starts now
- 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.
Bibb County, Alabama is in USDA Zone 8a. The average last spring frost is March 14 and the first fall frost is November 13, giving you a growing season of approximately 244 days.
At an elevation of 66 feet, Bibb County receives approximately 59.2 inches of rainfall annually with predominantly clay loam soil. Summer highs average 92°F, providing good warmth for Ageratum during the growing season. Clay soil retains moisture well for Ageratum, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Ageratum root diseases.
Bibb County Soil Profile
Soil Type
Clay Loam
Soil pH
5.3-6.6
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 Bibb County
How your county's soil matches Ageratum's growing requirements.
Soil pH
Your soil pH (5.3–6.6) is more acidic than Ageratum prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The clay loam soil in Bibb County is excellent for Ageratum — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Ageratum.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Ageratum.
How to Plant Ageratum
Succession Planting Ageratum
Sow every 6.9 weeks. Last sowing by Aug 30 to harvest before frost.
Ageratum Water Budget
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 | — | 4.6" | 0" | ❄️ Dormant |
| Feb | — | 4.2" | 0" | ❄️ Dormant |
| Mar | 4.3" | 6.3" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 5.4" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 6" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 6.5" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| Nov | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Bibb 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 — Bibb County, AL
Ageratum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 31 | Jan 31 – Feb 14 |
| Transplant Outdoors | March 7 | Mar 7 – Mar 21 |
| Direct Sow | March 7 | Mar 7 – Mar 28 |
| Bloom | May 2 | May 2 – Sep 19 |
· 8" apart · Rows 10" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
60–75 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 8a
📆 Growing Season
244 days in Bibb County
Growing Tips for Ageratum in Bibb County
Direct sow Ageratum outdoors after March 14 in Bibb County when soil has warmed and frost danger has passed.
With Bibb County's clay soil (26% clay), work in 3-4 inches of compost before planting Ageratum. Avoid tilling when soil is wet to prevent compaction.
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 Bibb County, AL?
Bibb County is in Zone 8a with an average last frost of March 14. Plan your Ageratum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Bibb County, AL?
Bibb County, Alabama is in USDA Hardiness Zone 8a. The average last spring frost is March 14 and first fall frost is November 13.
When should I plant Ageratum in Bibb County, ?
In Bibb County, , plant Ageratum after the last frost (around March 14) and before the first frost (around November 13). Best results when soil holds above 50°F.
What growing zone is Bibb County, for Ageratum?
Bibb County sits in USDA Zone 8a. Ageratum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Ageratum grow in Bibb County's climate?
Yes — Ageratum grows well in Bibb County's temperate climate. Bibb County averages a 244-day frost-free season, with last frost around March 14 and first frost around November 13.
Your Bibb County Garden Planner — Free
A 22-page printable planner built for Bibb County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.