When to plant Bachelor's Button in Spencer County, KY
In Spencer County, plant Bachelor's Button in spring between March 11 and April 1, once soil temps hold above 50°F. Spencer County's last frost averages April 8, so time plantings around the expected last-frost window for best survival. For a fall crop, sow between September 17 and October 1 — roughly 60–90 days before the first frost on October 29.
When to Plant Bachelor's Button in Spencer County, KY
Bachelor's Button (Centaurea cyanus), also called cornflower, is a carefree cool-season annual best known for its vivid cobalt-blue flowers — one of the truest blues in the annual garden. It tolerates light frosts, self-seeds prolifically, and thrives in poor to average soils. A traditional cut flower and pollinator magnet, it has been cultivated in gardens for centuries.
Spencer County, Kentucky is in USDA Zone 6b. The average last spring frost is April 8 and the first fall frost is October 29, giving you a growing season of approximately 204 days.
At an elevation of 2,819 feet, Spencer County receives approximately 40.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Bachelor's Button during the growing season.
Spencer County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Bachelor's Button Planting Timeline — Spencer County, KY
Bachelor's Button Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 25 | Feb 25 – Mar 11 |
| Transplant Outdoors | April 8 | Apr 8 – Apr 22 |
| Direct Sow | March 11 | Mar 11 – Apr 1 |
| Bloom | June 10 | Jun 10 – Sep 2 |
| Fall Sowing | September 17 | Sep 17 – Oct 1 |
Plant 0.3" deep · 12" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | Fall Sowing Bloom |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
204 days in Spencer County
Growing Tips for Spencer County
Direct-sow in early spring as soon as soil can be worked; seeds need a brief cold period for best germination (refrigerate for a few days before planting if spring arrives quickly). In zones 6+, fall-sow for the earliest spring bloom. Thin to 12 inches; do not over-fertilize — too much nitrogen produces foliage at the expense of flowers. Deadhead to prolong blooming or allow self-seeding for a naturalized colony.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Bachelor's Button in Other Locations
Frequently Asked Questions
When should I plant Bachelor's Button in Spencer County, KY?
Spencer County is in Zone 6b with an average last frost of April 8. Plan your Bachelor's Button planting based on this frost date — see the calendar above for exact timing.
What planting zone is Spencer County, KY?
Spencer County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 8 and first fall frost is October 29.
When should I plant Bachelor's Button in Spencer County, KY?
In Spencer County, KY, plant Bachelor's Button after the last frost (around April 8) and before the first frost (around October 29). Best results when soil holds above 50°F.
What growing zone is Spencer County, KY for Bachelor's Button?
Spencer County sits in USDA Zone 6b. Bachelor's Button grows reliably in zones 2a through 11b, so it's a good fit here.
Can Bachelor's Button grow in Spencer County's climate?
Yes — Bachelor's Button grows well in Spencer County's temperate climate. Spencer County averages a 204-day frost-free season, with last frost around April 8 and first frost around October 29.
Your Spencer County Garden Planner — Free
A 22-page printable planner built for Spencer 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.