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When to Plant Lemon Balm in Pike County, IL

Lemon balm is a vigorous perennial herb with bright green, lemon-scented leaves. It makes a refreshing tea and is easy to grow but can spread aggressively.

Pike County, Illinois is in USDA Zone 5b. The average last spring frost is April 15 and the first fall frost is October 16, giving you a growing season of approximately 184 days.

At an elevation of 916 feet, Pike County receives approximately 38.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83ยฐF, so choose short-season varieties of Lemon Balm to ensure they mature before fall.

Pike County, IL (Zone 5b) Moderate season
184 days
Last Spring Frost April 15
184 growing days
First Fall Frost October 16

Pike County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (64 days to spare)
Transplant: Apr 18 🍅 Harvest: Jun 20 – Aug 8
Recommended (50%) ✓ Fits season (65 days to spare)
Transplant: Apr 22 🍅 Harvest: Jun 24 – Aug 12
Safe Start (90%) ✓ Fits season (64 days to spare)
Transplant: May 7 🍅 Harvest: Jul 9 – Aug 27

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
0.4″/week
Watering frequency 1-2 times/week
Season total 690 gal / 100 sq ft
Lemon Balm needs ~796 GDD — county provides 2,254 GDD Excellent fit

Lemon Balm Planting Timeline โ€” Pike County, IL

Lemon Balm Planting Calendar

Activity When Date Range
Transplant Outdoors April 22 Apr 22 โ€“ May 6
Harvest June 24 Jun 24 โ€“ Aug 12

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 Harvest
July Harvest
August Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“70 days

Soil pH

5.5 โ€“ 7.5

USDA Zone

Zone 5b

Growing Season

184 days

Growing Tips for Pike County

Start from seed, cuttings, or divisions. Contain in pots or use barriers to prevent spreading. Harvest frequently to keep plants bushy and prevent flowering.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Lemon Balm in Pike County, IL?

Pike County is in Zone 5b with an average last frost of April 15. Plan your Lemon Balm planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Pike County, IL?

Pike County, Illinois is in USDA Hardiness Zone 5b. The average last spring frost is April 15 and first fall frost is October 16.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Pike County gardeners in Zone 5b 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 Pike County, IL. Local conditions may vary. Last updated: April 2026.