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When to Plant Lemon Balm in Washington County, NY

Washington County, New York Zone 5a April

Your April game plan for Washington County, New York

April is a pivotal month for Washington County, New York gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost May 8
Avg. first frost October 6
Soil temp (4") 44°F
Watering Low
Pest pressure Low
Daylight 13.2 hrs
To set up a strong May, finish these tasks
  • Transplants going out: lemon balm

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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.

Washington County, New York is in USDA Zone 5a. The average last spring frost is May 8 and the first fall frost is October 6, giving you a growing season of approximately 151 days.

At an elevation of 133 feet, Washington County receives approximately 49.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Lemon Balm during the growing season.

Washington County, NY (Zone 5a) Moderate season
151 days
Last Spring Frost May 8
151 growing days
First Fall Frost October 6
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Washington County Soil Profile

Soil Type

Silt Loam

Soil pH

5.2-6.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (33 days to spare)
Transplant: May 7 🍅 Harvest: Jul 9 – Aug 27
Recommended (50%) ✓ Fits season (32 days to spare)
Transplant: May 15 🍅 Harvest: Jul 17 – Sep 4
Safe Start (90%) ✓ Fits season (34 days to spare)
Transplant: May 29 🍅 Harvest: Jul 31 – Sep 18

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 Washington County

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

Soil pH

Your soil pH (5.2–6.7) overlaps with Lemon Balm's range (5.5–7.5), though not a perfect match.

Soil Texture

The silt loam soil in Washington County is excellent for Lemon Balm — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (3.9%). 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 151-day season

Sow every 6.9 weeks. Last sowing by Jul 28 to harvest before frost.

Plant Water Budget

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

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 4.1" 0" ❄️ Dormant
Feb 3.5" 0" ❄️ Dormant
Mar 3.7" 0" ❄️ Dormant
Apr 3.9" 0" ❄️ Dormant
May 2.2" 4.3" 0" ✅ Rainfall sufficient
Jun 2.2" 4.9" 0" ✅ Rainfall sufficient
Jul 2.2" 5.1" 0" ✅ Rainfall sufficient
Aug 2.2" 4.9" 0" ✅ Rainfall sufficient
Sep 2.2" 3.6" 0" ✅ Rainfall sufficient
Oct 2.2" 4.3" 0" ✅ Rainfall sufficient
Nov 3.8" 0" ❄️ Dormant
Dec 3.4" 0" ❄️ Dormant

Water needs are for active growing months only (May–Oct in Washington County). Supplement amounts are based on average rainfall — 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" — every day above 50°F 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 ~942 GDD — county provides 2,189 GDD Excellent fit

Lemon Balm Planting Timeline — Washington County, NY

Lemon Balm Planting Calendar

Activity When Date Range
Transplant Outdoors May 15 May 15 – May 29
Harvest July 17 Jul 17 – Sep 4

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

Month-by-Month Timeline

MonthActivities
January
February
March
April
May Transplant Outdoors
June
July Harvest
August Harvest
September Harvest
October
November
December
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Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

60–70 days

🧪 Soil pH

Needs 5.5–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 5a

📆 Growing Season

151 days in Washington County

Growing Tips for Lemon Balm in Washington County

Direct sow Lemon Balm outdoors after May 08 in Washington 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 Washington County, NY?

Washington County is in Zone 5a with an average last frost of May 8. Plan your Lemon Balm planting based on this frost date — see the calendar above for exact timing.

What planting zone is Washington County, NY?

Washington County, New York is in USDA Hardiness Zone 5a. The average last spring frost is May 8 and first fall frost is October 6.

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Your Washington County Garden Planner — Free

A 24-page printable planner built for Washington County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Washington County, NY. Local conditions may vary. Last updated: April 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.