When to plant Ageratum in Phelps County, MO
Phelps County sits in USDA Zone 6b. Plant Ageratum between April 9 (after last frost on April 9) and April 30.
When to Plant Ageratum in Phelps County, MO
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.
Phelps County, Missouri is in USDA Zone 6b. The average last spring frost is April 9 and the first fall frost is October 24, giving you a growing season of approximately 198 days.
At an elevation of 1,057 feet, Phelps County receives approximately 40.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Ageratum during the growing season.
Phelps County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Ageratum Planting Timeline — Phelps County, MO
Ageratum Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 19 | Feb 19 – Mar 5 |
| Transplant Outdoors | April 9 | Apr 9 – Apr 23 |
| Direct Sow | April 9 | Apr 9 – Apr 30 |
| Bloom | June 4 | Jun 4 – Sep 17 |
· 8" apart · Rows 10" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | Transplant Outdoors Direct Sow |
| May | — |
| 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 6b
📆 Growing Season
198 days in Phelps County
Growing Tips for Phelps 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 Phelps County, MO?
Phelps County is in Zone 6b with an average last frost of April 9. Plan your Ageratum planting based on this frost date — see the calendar above for exact timing.
What planting zone is Phelps County, MO?
Phelps County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is April 9 and first fall frost is October 24.
When should I plant Ageratum in Phelps County, MO?
In Phelps County, MO, plant Ageratum after the last frost (around April 9) and before the first frost (around October 24). Best results when soil holds above 50°F.
What growing zone is Phelps County, MO for Ageratum?
Phelps County sits in USDA Zone 6b. Ageratum grows reliably in zones 3a through 11b, so it's a good fit here.
Can Ageratum grow in Phelps County's climate?
Yes — Ageratum grows well in Phelps County's temperate climate. Phelps County averages a 198-day frost-free season, with last frost around April 9 and first frost around October 24.
Your Phelps County Garden Planner — Free
A 22-page printable planner built for Phelps County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.