When to plant Ageratum in Larue County, KY
Larue County gardeners should plant Ageratum between April 4 and April 25 in spring. With Larue County's Zone 7a climate (last frost April 4), Ageratum needs 60–75 days to mature — plant by August 18 for a full harvest.
When to Plant Ageratum in Larue County, KY
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.
Larue County, Kentucky is in USDA Zone 7a. The average last spring frost is April 4 and the first fall frost is November 1, giving you a growing season of approximately 211 days.
At an elevation of 2,923 feet, Larue County receives approximately 52.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Ageratum during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Ageratum root diseases.
Larue County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Ageratum Planting Timeline — Larue County, KY
Ageratum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 21 | Feb 21 – Mar 7 |
| Transplant Outdoors | April 4 | Apr 4 – Apr 18 |
| Direct Sow | April 4 | Apr 4 – Apr 25 |
| Bloom | May 30 | May 30 – Sep 19 |
· 8" apart · Rows 10" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | Transplant Outdoors Direct Sow |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
60–75 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 7a
📆 Growing Season
211 days in Larue County
Growing Tips for Larue County
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
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Ageratum in Other Locations
Frequently Asked Questions
When should I plant Ageratum in Larue County, KY?
Larue County is in Zone 7a with an average last frost of April 4. Plan your Ageratum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Larue County, KY?
Larue County, Kentucky is in USDA Hardiness Zone 7a. The average last spring frost is April 4 and first fall frost is November 1.
When should I plant Ageratum in Larue County, KY?
In Larue County, KY, plant Ageratum after the last frost (around April 4) and before the first frost (around November 1). Best results when soil holds above 50°F.
What growing zone is Larue County, KY for Ageratum?
Larue County sits in USDA Zone 7a. Ageratum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Ageratum grow in Larue County's climate?
Yes — Ageratum grows well in Larue County's temperate climate. Larue County averages a 211-day frost-free season, with last frost around April 4 and first frost around November 1.
Your Larue County Garden Planner — Free
A 22-page printable planner built for Larue County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.