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When to Plant Lemon Balm in Beaver 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.

Beaver County, Utah is in USDA Zone 5b. The average last spring frost is May 21 and the first fall frost is September 29, giving you a growing season of approximately 131 days.

At an elevation of 7,589 feet, Beaver County receives approximately 24.3 inches of rainfall annually with predominantly loam soil. Summer highs average 85ยฐF, providing good warmth for Lemon Balm during the growing season.

Beaver County, UT (Zone 5b) Short season
131 days
Last Spring Frost May 21
131 growing days
First Fall Frost September 29

Beaver County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (12 days to spare)
Transplant: May 20 🍅 Harvest: Jul 22 – Sep 9
Recommended (50%) ✓ Fits season (12 days to spare)
Transplant: May 28 🍅 Harvest: Jul 30 – Sep 17
Safe Start (90%) ✓ Fits season (7 days to spare)
Transplant: Jun 17 🍅 Harvest: Aug 19 – Oct 7

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.

Soil Compatibility in Beaver County

How your county's soil matches Lemon Balm's growing requirements.

Soil pH

Your soil pH (6.5โ€“7.8) overlaps with Lemon Balm's range (5.5โ€“7.5), though not a perfect match.

Soil Texture

The loam soil in Beaver County is excellent for Lemon Balm โ€” good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Lemon Balm.

Organic Matter

Organic matter is moderate (2.8%). Annual compost additions will help Lemon Balm.

How to Plant Lemon Balm

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Lemon Balm

2
successive plantings in your 131-day season

Sow every 6.9 weeks. Last sowing by Jul 21 to harvest before frost.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Lemon Balm

Lemon Balm needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Lemon Balm Needs Rainfall You Supplement Action
Jan โ€” 1.7" 0" โ„๏ธ Dormant
Feb โ€” 1.4" 0" โ„๏ธ Dormant
Mar โ€” 2.5" 0" โ„๏ธ Dormant
Apr โ€” 2.3" 0" โ„๏ธ Dormant
May 2.2" 2.9" 0" โœ… Rainfall sufficient
Jun 2.2" 1.6" 0.6" ๐Ÿ’ง Light watering
Jul 2.2" 2.4" 0" โœ… Rainfall sufficient
Aug 2.2" 2.3" 0" โœ… Rainfall sufficient
Sep 2.2" 2" 0.2" ๐Ÿ’ง Light watering
Oct โ€” 2.3" 0" โ„๏ธ Dormant
Nov โ€” 1.6" 0" โ„๏ธ Dormant
Dec โ€” 1.4" 0" โ„๏ธ Dormant

Water needs are for active growing months only (Mayโ€“Sep in Beaver County). Supplement amounts are based on average rainfall โ€” actual needs vary with temperature, soil, and mulching.

Lemon Balm Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" โ€” every day above 50ยฐF deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Lemon Balm needs ~894 GDD — county provides 1,801 GDD Excellent fit

Lemon Balm Planting Timeline โ€” Beaver County, UT

Lemon Balm Planting Calendar

Activity When Date Range
Transplant Outdoors May 28 May 28 โ€“ Jun 11
Harvest July 30 Jul 30 โ€“ Sep 17

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 Transplant Outdoors
June Transplant Outdoors
July Harvest
August Harvest
September Harvest
October โ€”
November โ€”
December โ€”

Growing Conditions

โ˜€๏ธ Sun

Partial Shade (3-6 hours)

๐Ÿ’ง Water

0.5"/week ยท Natural rainfall sufficient

๐Ÿ“… Days to Maturity

60โ€“70 days

๐Ÿงช Soil pH

Needs 5.5โ€“7.5 ยท Your soil: acceptable

๐Ÿ—บ๏ธ USDA Zone

Zone 5b

๐Ÿ“† Growing Season

131 days in Beaver County

Growing Tips for Lemon Balm in Beaver County

Direct sow Lemon Balm outdoors after May 21 in Beaver County when soil has warmed and frost danger has passed.

General growing tips

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

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lemon Balm in Beaver County, UT?

Beaver County is in Zone 5b with an average last frost of May 21. Plan your Lemon Balm planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Beaver County, UT?

Beaver County, Utah is in USDA Hardiness Zone 5b. The average last spring frost is May 21 and first fall frost is September 29.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Beaver County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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