When to plant Vinca (Annual) in Campbell County, KY
Plant Vinca (Annual) in Campbell County during the brief April 25–May 9 window. With 189 frost-free days, fall plantings can't mature before October 24.
When to Plant Vinca (Annual) in Campbell County, KY
Annual vinca (Catharanthus roseus), also called Madagascar periwinkle, is one of the most heat- and drought-tolerant bedding plants available. Glossy foliage stays attractive all season while cheerful pinwheel blooms continue without deadheading. A top performer in hot, humid Southern summers where impatiens and begonias struggle. Self-cleaning; requires little maintenance once established.
Campbell County, Kentucky is in USDA Zone 6b. The average last spring frost is April 18 and the first fall frost is October 24, giving you a growing season of approximately 189 days.
At an elevation of 3,725 feet, Campbell County receives approximately 47.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Vinca (Annual) during the growing season.
Campbell County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Vinca (Annual) Planting Timeline — Campbell County, KY
Vinca (Annual) Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 7 | Feb 7 – Feb 21 |
| Transplant Outdoors | April 25 | Apr 25 – May 9 |
| Bloom | July 4 | Jul 4 – Oct 17 |
Plant 0.1" deep · 10" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | — |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
189 days in Campbell County
Growing Tips for Campbell County
Start seeds indoors 10–12 weeks before last frost — germination requires warm soil (75–80°F) and darkness. Do not cover seeds deeply; they need just a light dusting. Direct sowing is rarely practiced due to slow seedling establishment. Transplant after soil warms and frost danger has passed. Excellent drought tolerance once established; avoid overwatering. Performs best in well-drained beds or containers in full sun.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Vinca (Annual) in Other Locations
Frequently Asked Questions
When should I plant Vinca (Annual) in Campbell County, KY?
Campbell County is in Zone 6b with an average last frost of April 18. Plan your Vinca (Annual) planting based on this frost date — see the calendar above for exact timing.
What planting zone is Campbell County, KY?
Campbell County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 18 and first fall frost is October 24.
When should I plant Vinca (Annual) in Campbell County, KY?
In Campbell County, KY, plant Vinca (Annual) after the last frost (around April 18) and before the first frost (around October 24). Best results when soil holds above 50°F.
What growing zone is Campbell County, KY for Vinca (Annual)?
Campbell County sits in USDA Zone 6b. Vinca (Annual) grows reliably in zones 3a through 11b, so it's a good fit here.
Can Vinca (Annual) grow in Campbell County's climate?
Yes — Vinca (Annual) grows well in Campbell County's temperate climate. Campbell County averages a 189-day frost-free season, with last frost around April 18 and first frost around October 24.
Your Campbell County Garden Planner — Free
A 22-page printable planner built for Campbell 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.