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When to Plant Garlic in Rockland County, NY

Rockland County, New York Zone 7a May

Rockland County, New York gardeners: here's your May plan

Each item below is timed to Rockland County, New York's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost March 29
Avg. first frost November 12
Soil temp (4") 64°F
Watering Low
Pest pressure Low
Daylight 14.3 hrs

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Garlic is a pungent allium planted in fall and harvested the following summer. Hardneck varieties produce edible flower stalks (scapes) and are more cold-hardy.

Rockland County, New York is in USDA Zone 7a. The average last spring frost is March 29 and the first fall frost is November 12, giving you a growing season of approximately 228 days.

At an elevation of 746 feet, Rockland County receives approximately 43.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 88°F, providing good warmth for Garlic during the growing season.

Rockland County, NY (Zone 7a) Long season
228 days
Last Spring Frost March 29
228 growing days
First Fall Frost November 12
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Rockland County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (4 days to spare)
Transplant: Mar 25 🍅 Harvest: Jun 24 – Nov 4
Recommended (50%) ✓ Fits season (4 days to spare)
Transplant: Mar 29 🍅 Harvest: Jun 28 – Nov 8
Safe Start (90%) ✓ Fits season (13 days to spare)
Transplant: Apr 9 🍅 Harvest: Jul 9 – Nov 19

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 Rockland County

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

Soil pH

Your soil pH (5.0–6.2) is more acidic than Garlic prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (3.9%). Annual compost additions will help Garlic.

How to Plant Garlic

1"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 6 weeks before your first frost date for a fall harvest.

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

Monthly Watering Guide for Garlic

Garlic 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 Garlic Needs Rainfall You Supplement Action
Jan 3.2" 0" ❄️ Dormant
Feb 3.1" 0" ❄️ Dormant
Mar 2.2" 4.1" 0" ✅ Rainfall sufficient
Apr 2.2" 3.3" 0" ✅ Rainfall sufficient
May 2.2" 4.3" 0" ✅ Rainfall sufficient
Jun 2.2" 4.5" 0" ✅ Rainfall sufficient
Jul 2.2" 4.3" 0" ✅ Rainfall sufficient
Aug 2.2" 3.9" 0" ✅ Rainfall sufficient
Sep 2.2" 3.5" 0" ✅ Rainfall sufficient
Oct 2.2" 4" 0" ✅ Rainfall sufficient
Nov 2.2" 2.8" 0" ✅ Rainfall sufficient
Dec 2.8" 0" ❄️ Dormant

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

Garlic 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.

Garlic needs ~2,640 GDD — county provides 3,648 GDD Excellent fit

Garlic Planting Timeline — Rockland County, NY

Garlic Planting Calendar

Activity When Date Range
Fall Sowing October 1 Oct 1 – Oct 15

Plant 1" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April
May
June
July
August
September
October Fall Sowing
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

90–240 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_acidic

🗺️ USDA Zone

Zone 7a

📆 Growing Season

228 days in Rockland County

Growing Tips for Garlic in Rockland County

Direct sow Garlic outdoors after March 29 in Rockland County when soil has warmed and frost danger has passed.

Your 228.0-day growing season in Rockland County is tight for Garlic (90.0-240.0 days to maturity). Start indoors and choose early-maturing varieties.

Common pests for Garlic in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.

General growing tips

Plant individual cloves pointed end up in fall, 6 weeks before ground freezes. Mulch heavily with straw. Harvest when lower leaves begin to brown but 5-6 green leaves remain.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans
  • Asparagus

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Garlic in Rockland County, NY?

Rockland County is in Zone 7a with an average last frost of March 29. Plan your Garlic planting based on this frost date — see the calendar above for exact timing.

What planting zone is Rockland County, NY?

Rockland County, New York is in USDA Hardiness Zone 7a. The average last spring frost is March 29 and first fall frost is November 12.

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Your Rockland County Garden Planner — Free

A 24-page printable planner built for Rockland County (Zone 7a). 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 Rockland County, NY. Local conditions may vary. Last updated: May 2026.

Sources & credits

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