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When to plant Cumin in Mill River, MA

Spring Cumin in Mill River goes in April 22–May 13, once nighttime temps stop dipping near freezing. A second sowing from August 3 to August 17 extends the harvest into fall.

When to Plant Cumin in Mill River, MA

Berkshire County, Massachusetts Zone 5b July

July in Berkshire County, Massachusetts — your action list

Welcome to July in Zone 5b. These are the moves that will have the biggest impact on your growing season.

Avg. last frost May 6
Avg. first frost October 12
Soil temp (4") 75°F
Watering Moderate
Pest pressure High
Daylight 14.8 hrs
Before August arrives, get these ready
  • First harvests: cumin
  • Fall sowing: cumin

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Cumin is a warm-season annual herb whose seeds are one of the most widely used spices globally. It requires a long, hot growing season of 3-4 months.

Mill River, Massachusetts is in USDA Zone 5b. The average last spring frost is May 6 and the first fall frost is October 12, giving you a growing season of approximately 159 days.

At an elevation of 392 feet, Berkshire County receives approximately 41.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Cumin during the growing season.

Mill River, MA (Zone 5b) Moderate season
159 days
Last Spring Frost May 6
159 growing days
First Fall Frost October 12

Mill River Soil Profile

Soil Type

Silt Loam

Soil pH

5.1-6.7

Drainage

Well Drained

Cumin Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Mar 25 Transplant: Apr 22 🍅 Harvest: Aug 5 – Oct 7
Recommended (50%) ✗ May not fit
Start indoors: Apr 1 Transplant: Apr 29 🍅 Harvest: Aug 12 – Oct 14
Safe Start (90%) ✗ May not fit
Start indoors: Apr 13 Transplant: May 11 🍅 Harvest: Aug 24 – Oct 26

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 Mill River

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

Soil pH

Your soil pH (5.1–6.7) is more acidic than Cumin prefers (6.0–8.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.4%). Annual compost additions will help Cumin.

How to Plant Cumin

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

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Cumin Water Budget

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

Monthly Watering Guide for Cumin

Cumin 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 Cumin Needs Rainfall You Supplement Action
Jan 3.1" 0" ❄️ Dormant
Feb 2.8" 0" ❄️ Dormant
Mar 3.6" 0" ❄️ Dormant
Apr 3.7" 0" ❄️ Dormant
May 2.2" 3.7" 0" ✅ Rainfall sufficient
Jun 2.2" 4" 0" ✅ Rainfall sufficient
Jul 2.2" 3.5" 0" ✅ Rainfall sufficient
Aug 2.2" 3.6" 0" ✅ Rainfall sufficient
Sep 2.2" 3.8" 0" ✅ Rainfall sufficient
Oct 2.2" 3.2" 0" ✅ Rainfall sufficient
Nov 3.2" 0" ❄️ Dormant
Dec 3" 0" ❄️ Dormant

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

Cumin 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.

Cumin needs ~1,595 GDD — county provides 2,305 GDD Excellent fit

Cumin Planting Timeline — Mill River, MA

Cumin Planting Calendar

Activity When Date Range
Start Indoors April 1 Apr 1 – Apr 15
Transplant Outdoors April 29 Apr 29 – May 13
Direct Sow April 22 Apr 22 – May 13
Harvest August 12 Aug 12 – Oct 14
Fall Sowing August 3 Aug 3 – Aug 17

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

Month-by-Month Timeline

MonthActivities
January
February
March
April Start Indoors Transplant Outdoors Direct Sow
May Transplant Outdoors Direct Sow
June
July
August Fall Sowing Harvest
September Harvest
October Harvest
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–8 · Your soil: too_acidic

🗺️ USDA Zone

Zone 5b

📆 Growing Season

159 days in Berkshire County

Growing Tips for Cumin in Mill River

Direct sow Cumin outdoors after May 06 in Berkshire County when soil has warmed and frost danger has passed.

Common pests for Cumin in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 4 weeks before last frost. Transplant after all danger of frost. Harvest when seed heads turn brown. Requires consistent warmth for proper seed development.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Check more plant combinations with our Companion Planting Checker →

When should I plant Cumin in Mill River, MA?

In Mill River, MA, plant Cumin after the last frost (around May 6) and before the first frost (around October 12). Best results when soil holds above 50°F.

What growing zone is Mill River, MA for Cumin?

Mill River sits in USDA Zone 5b. Cumin grows reliably in zones 5a through 11b, so it's a good fit here.

Can Cumin grow in Mill River's climate?

Yes — Cumin grows well in Mill River's temperate climate. Mill River averages a 159-day frost-free season, with last frost around May 6 and first frost around October 12.

🌱

Your Berkshire County Garden Planner — Free

A 22-page printable planner built for Berkshire County (Zone 5b). 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 Berkshire County, MA. Local conditions may vary. Last updated: July 2026.