Zone 4 · Alliums Growing Guide

When to Plant Garlic
in Zone 4

Plant in fall, harvest in summer. One of the most satisfying long-season crops — almost no maintenance from October to June. Plant pointed end up, 2 inches deep.

Plant outdoors
Sep 20 – Oct 20
Start indoors
Direct sow
Last Frost
~May 1
Days to harvest
240–270 days
Difficulty
Easy
Wrong season — Zone 4
Harvest window: Jul

Planting Calendar

In Zone 4, Garlic should be planted outdoors Sep 20 – Oct 20, after the average last frost date of approximately May 1.

Hardneck varieties essential — need cold vernalization. Mulch with 4–6 inches of straw after planting.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Moderate
Spacing
6–8 inches
Soil
Well-draining, loose, fertile
Days to maturity
240–270 days
Soil pH
6.0–7.0
plant tip · Zone 4

Hardneck varieties essential — need cold vernalization. Mulch with 4–6 inches of straw after planting.

Feeding Schedule

How often
twice a season
Feed type
high nitrogen then none
Key timing
autumn planting and early spring

Feed with nitrogen-rich fertilizer when shoots appear in spring. Stop feeding by late spring as bulbs swell — nitrogen at that stage reduces bulb size.

Companion Planting for Garlic

What you plant next to garlic makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Tomatoes
  • Peppers
  • Carrots
  • Roses
Keep away from
  • Peas
  • Beans
  • Asparagus

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Common questions

In Zone 4, garlic is a fall-planted crop. Plant outdoors Sep 20 – Oct 20 once temperatures cool in autumn. It overwinters and is ready to harvest around Jul. No last frost consideration — plant before the ground freezes.
Zone 4 has an average last spring frost of approximately May 1 and a first fall frost around Oct 1. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for garlic include Tomatoes, Peppers, Carrots, Roses. Avoid planting near Peas, Beans, Asparagus, which can compete for nutrients or attract pests.
Garlic typically takes 240–270 days from transplant or direct sow to harvest in Zone 4. Expected harvest window: Jul.

Recipes using this crop

Great ways to use your harvest — see all recipes

Preserves & Condiments

Roasted Garlic Butter

50 min · easy

Mains

Forty Clove Chicken

70 min · easy

Free app · iOS February 2028

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Garlic in other zones
Crop Guides