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When to Plant Lemon Balm in Weber County, UT

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.

Weber County, Utah is in USDA Zone 6a. The average last spring frost is May 26 and the first fall frost is September 21, giving you a growing season of approximately 118 days.

At an elevation of 6,211 feet, Weber County receives approximately 18.4 inches of rainfall annually with predominantly loam soil. Summer highs average 86ยฐF, providing good warmth for Lemon Balm during the growing season. With low rainfall, drip irrigation is essential for growing Lemon Balm successfully. Mulch heavily to conserve soil moisture.

Weber County, UT (Zone 6a) Short season
118 days
Last Spring Frost May 26
118 growing days
First Fall Frost September 21

Weber County Soil Profile

Soil Type

Loam

Soil pH

6.6-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (6 days to spare)
Transplant: May 14 🍅 Harvest: Jul 16 – Sep 3
Recommended (50%) ✗ May not fit
Transplant: Jun 2 🍅 Harvest: Aug 4 – Sep 22
Safe Start (90%) ✓ Fits season (5 days to spare)
Transplant: Jun 26 🍅 Harvest: Aug 28 – Oct 16

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
0.7″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 435 gal / 100 sq ft
Drought risk

Water stress score is 8/10 โ€” consider drought-tolerant varieties and mulching

Lemon Balm needs ~942 GDD — county provides 1,711 GDD Excellent fit

Lemon Balm Planting Timeline โ€” Weber County, UT

Lemon Balm Planting Calendar

Activity When Date Range
Transplant Outdoors June 2 Jun 2 โ€“ Jun 16
Harvest August 4 Aug 4 โ€“ Sep 22

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May โ€”
June Transplant Outdoors
July โ€”
August Harvest
September Harvest
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 6a

Growing Season

118 days

Growing Tips for Weber 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 Weber County, UT?

Weber County is in Zone 6a with an average last frost of May 26. Plan your Lemon Balm planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Weber County, UT?

Weber County, Utah is in USDA Hardiness Zone 6a. The average last spring frost is May 26 and first fall frost is September 21.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Weber 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 Weber County, UT. Local conditions may vary. Last updated: April 2026.