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When to Plant Bee Balm in Rockcastle County, KY

Bee balm is a native perennial herb with shaggy, scarlet flower heads that attract hummingbirds, bees, and butterflies. Its leaves make an aromatic tea reminiscent of Earl Grey.

Rockcastle County, Kentucky is in USDA Zone 6b. The average last spring frost is April 16 and the first fall frost is October 23, giving you a growing season of approximately 190 days.

At an elevation of 1,677 feet, Rockcastle County receives approximately 41.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91ยฐF, providing good warmth for Bee Balm during the growing season.

Rockcastle County, KY (Zone 6b) Moderate season
190 days
Last Spring Frost April 16
190 growing days
First Fall Frost October 23

Rockcastle County Soil Profile

Soil Type

Silt Loam

Soil pH

5.3-6.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (18 days to spare)
Transplant: Apr 15 🍅 Harvest: Jul 15 – Sep 30
Recommended (50%) ✓ Fits season (15 days to spare)
Transplant: Apr 23 🍅 Harvest: Jul 23 – Oct 8
Safe Start (90%) ✓ Fits season (10 days to spare)
Transplant: May 8 🍅 Harvest: Aug 7 – Oct 23

Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 143 gal / 100 sq ft
Bee Balm needs ~1,916 GDD — county provides 3,467 GDD Excellent fit

Bee Balm Planting Timeline โ€” Rockcastle County, KY

Bee Balm Planting Calendar

Activity When Date Range
Transplant Outdoors April 23 Apr 23 โ€“ May 7
Harvest July 23 Jul 23 โ€“ Oct 8

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Transplant Outdoors
May Transplant Outdoors
June โ€”
July Harvest
August Harvest
September Harvest
October Harvest
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

90โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

190 days

Growing Tips for Rockcastle County

Start from seed, divisions, or transplants. Provide good air circulation to prevent powdery mildew. Deadhead spent flowers for reblooming. Divide clumps every 3 years.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Bee Balm in Rockcastle County, KY?

Rockcastle County is in Zone 6b with an average last frost of April 16. Plan your Bee Balm planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Rockcastle County, KY?

Rockcastle County, Kentucky is in USDA Hardiness Zone 6b. The average last spring frost is April 16 and first fall frost is October 23.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Rockcastle County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Rockcastle County, KY. Local conditions may vary. Last updated: April 2026.