When to plant Astilbe in Logan County, KS
Plant Astilbe in Logan County during the brief May 7–May 21 window. With 165 frost-free days, fall plantings can't mature before October 12.
When to Plant Astilbe in Logan County, KS
Astilbe (Astilbe x arendsii) is a premier perennial for shaded, moist gardens, producing feathery plume-like flower spikes in shades of pink, red, white, and lavender above deeply cut, ferny foliage. Originating in Asia and naturalized in shade gardens worldwide, astilbe thrives where many sun-lovers fail: under trees, beside water features, or in persistently moist woodland borders. The dried flower plumes remain attractive through fall and winter. Different cultivars extend the bloom season from early summer through early fall when several varieties are combined.
Logan County, Kansas is in USDA Zone 6a. The average last spring frost is April 30 and the first fall frost is October 12, giving you a growing season of approximately 165 days.
At an elevation of 764 feet, Logan County receives approximately 22.5 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Astilbe during the growing season.
Logan County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Astilbe Planting Timeline — Logan County, KS
Astilbe Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 26 | Feb 26 – Mar 12 |
| Transplant Outdoors | May 7 | May 7 – May 21 |
| Bloom | July 16 | Jul 16 – Sep 24 |
Plant 1.5" deep · 18" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
High — keep soil consistently moist
📅 Days to Maturity
70–100 days
🧪 Soil pH
Needs 6–8 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
165 days in Logan County
Growing Tips for Logan County
Plant bare-root crowns in spring as soon as the ground is workable, setting eyes 1–2 inches below soil level. Fall planting (Zones 4+) is equally effective. Consistent moisture is non-negotiable — astilbe will wilt and scorch in drought. Amend with generous compost to improve moisture retention. Partial shade (morning sun, afternoon shade) is ideal; deep shade reduces bloom but foliage remains. Fertilize lightly in spring with a balanced slow-release granular. Divide every 3–5 years in early spring as clumps become congested. Leave plumes standing through winter for ornamental interest and wildlife value. Year 2+ plants produce the fullest bloom spikes; first-year crowns may flower lightly or not at all.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Astilbe in Other Locations
Frequently Asked Questions
When should I plant Astilbe in Logan County, KS?
Logan County is in Zone 6a with an average last frost of April 30. Plan your Astilbe planting based on this frost date — see the calendar above for exact timing.
What planting zone is Logan County, KS?
Logan County, Kansas is in USDA Hardiness Zone 6a. The average last spring frost is April 30 and first fall frost is October 12.
When should I plant Astilbe in Logan County, KS?
In Logan County, KS, plant Astilbe after the last frost (around April 30) and before the first frost (around October 12). Best results when soil holds above 50°F.
What growing zone is Logan County, KS for Astilbe?
Logan County sits in USDA Zone 6a. Astilbe grows reliably in zones 3a through 8b, so it's a good fit here.
Can Astilbe grow in Logan County's climate?
Yes — Astilbe grows well in Logan County's temperate climate. Logan County averages a 165-day frost-free season, with last frost around April 30 and first frost around October 12.
Your Logan County Garden Planner — Free
A 22-page printable planner built for Logan County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.