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When to plant Horehound in Worcester County County,

Worcester County County's short 176-day growing season means one Horehound planting between May 1 and May 15. No fall crop in Zone 6a.

When to Plant Horehound in Worcester County, MA

Worcester County, Massachusetts Zone 6a June

Your June planting checklist for Worcester County, Massachusetts

June is a pivotal month for Worcester County, Massachusetts gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost April 24
Avg. first frost October 17
Soil temp (4") 71°F
Watering Moderate
Pest pressure High
Daylight 15.1 hrs
July will be here before you know it — start on
  • First harvests: horehound

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Horehound is a woolly, drought-tolerant perennial herb traditionally used for cough remedies and candy. It has a distinctive bitter, menthol-like flavor.

Worcester County, Massachusetts is in USDA Zone 6a. The average last spring frost is April 24 and the first fall frost is October 17, giving you a growing season of approximately 176 days.

At an elevation of 972 feet, Worcester County receives approximately 38 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Horehound during the growing season.

Worcester County, MA (Zone 6a) Moderate season
176 days
Last Spring Frost April 24
176 growing days
First Fall Frost October 17
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Worcester County Soil Profile

Soil Type

Silt Loam

Soil pH

4.8-6.3

Drainage

Well Drained

Horehound Planting Risk Windows

Early Start (70% safe) ✓ Fits season (34 days to spare)
Transplant: Apr 27 🍅 Harvest: Jul 13 – Sep 7
Recommended (50%) ✓ Fits season (36 days to spare)
Transplant: May 1 🍅 Harvest: Jul 17 – Sep 11
Safe Start (90%) ✓ Fits season (32 days to spare)
Transplant: May 20 🍅 Harvest: Aug 5 – Sep 30

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 Worcester County

How your county's soil matches Horehound's growing requirements.

Soil pH

Your soil pH (4.8–6.3) is more acidic than Horehound prefers (6.0–8.0). Add garden lime to raise pH.

Soil Texture

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

Drainage

Horehound prefers dry conditions but your soil drains poorly. Use raised beds or mounded rows to prevent root rot.

Organic Matter

Organic matter is moderate (3.7%). Annual compost additions will help Horehound.

How to Plant Horehound

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

Succession Planting Horehound

2
successive plantings in your 176-day season

Sow every 8.6 weeks. Last sowing by Jul 19 to harvest before frost.

Horehound Water Budget

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

Monthly Watering Guide for Horehound

Horehound 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 Horehound Needs Rainfall You Supplement Action
Jan 2.3" 0" ❄️ Dormant
Feb 2.6" 0" ❄️ Dormant
Mar 3.4" 0" ❄️ Dormant
Apr 2.2" 3.7" 0" ✅ Rainfall sufficient
May 2.2" 3.5" 0" ✅ Rainfall sufficient
Jun 2.2" 3" 0" ✅ Rainfall sufficient
Jul 2.2" 4.1" 0" ✅ Rainfall sufficient
Aug 2.2" 3.3" 0" ✅ Rainfall sufficient
Sep 2.2" 3" 0" ✅ Rainfall sufficient
Oct 2.2" 2.8" 0" ✅ Rainfall sufficient
Nov 3.3" 0" ❄️ Dormant
Dec 2.9" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Oct in Worcester County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Horehound 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.

Horehound needs ~1,134 GDD — county provides 2,420 GDD Excellent fit

Horehound Planting Timeline — Worcester County, MA

Horehound Planting Calendar

Activity When Date Range
Transplant Outdoors May 1 May 1 – May 15
Harvest July 17 Jul 17 – Sep 11

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

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

75–90 days

🧪 Soil pH

Needs 6–8 · Your soil: too_acidic

🗺️ USDA Zone

Zone 6a

📆 Growing Season

176 days in Worcester County

Growing Tips for Horehound in Worcester County

Direct sow Horehound outdoors after April 24 in Worcester County when soil has warmed and frost danger has passed.

General growing tips

Direct sow or start from divisions. Thrives in poor, dry soil. Harvest stems just before flowering. Deadhead to prevent aggressive self-seeding. Very drought-tolerant once established.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Horehound in Worcester County, MA?

Worcester County is in Zone 6a with an average last frost of April 24. Plan your Horehound planting based on this frost date — see the calendar above for exact timing.

What planting zone is Worcester County, MA?

Worcester County, Massachusetts is in USDA Hardiness Zone 6a. The average last spring frost is April 24 and first fall frost is October 17.

When should I plant Horehound in Worcester County County, ?

In Worcester County County, , plant Horehound after the last frost (around April 24) and before the first frost (around October 17). Best results when soil holds above 50°F.

What growing zone is Worcester County County, for Horehound?

Worcester County County sits in USDA Zone 6a. Horehound grows reliably in zones 3a through 10b, so it's a good fit here.

Can Horehound grow in Worcester County County's climate?

Yes — Horehound grows well in Worcester County County's temperate climate. Worcester County County averages a 176-day frost-free season, with last frost around April 24 and first frost around October 17.

🌱

Your Worcester County Garden Planner — Free

A 22-page printable planner built for Worcester County (Zone 6a). 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 Worcester County, MA. Local conditions may vary. Last updated: June 2026.

Sources & credits

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