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When to Plant Borage in Lake County, OH

Borage is a self-seeding annual herb with star-shaped blue flowers that attract pollinators. Its leaves have a cucumber-like flavor and the flowers are edible.

Lake County, Ohio is in USDA Zone 6a. The average last spring frost is May 5 and the first fall frost is October 13, giving you a growing season of approximately 161 days.

At an elevation of 740 feet, Lake County receives approximately 35.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Borage during the growing season.

Lake County, OH (Zone 6a) Moderate season
161 days
Last Spring Frost May 5
161 growing days
First Fall Frost October 13

Lake County Soil Profile

Soil Type

Silt Loam

Soil pH

6.3-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (64 days to spare)
Start indoors: Mar 25 Transplant: Apr 22 🍅 Harvest: Jun 17 – Aug 5
Recommended (50%) ✓ Fits season (63 days to spare)
Start indoors: Mar 31 Transplant: Apr 28 🍅 Harvest: Jun 23 – Aug 11
Safe Start (90%) ✓ Fits season (60 days to spare)
Start indoors: Apr 17 Transplant: May 15 🍅 Harvest: Jul 10 – Aug 28

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
0.5″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Borage needs ~839 GDD — county provides 2,455 GDD Excellent fit

Borage Planting Timeline โ€” Lake County, OH

Borage Planting Calendar

Activity When Date Range
Start Indoors March 31 Mar 31 โ€“ Apr 14
Transplant Outdoors April 28 Apr 28 โ€“ May 12
Direct Sow April 21 Apr 21 โ€“ May 12
Fall Sowing August 4 Aug 4 โ€“ Aug 18
Harvest June 23 Jun 23 โ€“ Aug 11

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Start Indoors
April Start Indoors Transplant Outdoors Direct Sow
May Transplant Outdoors Direct Sow
June Harvest
July Harvest
August Fall Sowing Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

50โ€“60 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6a

Growing Season

161 days

Growing Tips for Lake County

Direct sow in spring as borage does not transplant well. Allow some plants to go to seed for next year. Young leaves are best; older leaves become bristly.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Borage in Lake County, OH?

Lake County is in Zone 6a with an average last frost of May 5. Plan your Borage planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Lake County, OH?

Lake County, Ohio is in USDA Hardiness Zone 6a. The average last spring frost is May 5 and first fall frost is October 13.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Lake County gardeners in Zone 6a 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 Lake County, OH. Local conditions may vary. Last updated: April 2026.