Storage Techniques for Garlic and Onions on Small Farms

Garlic and onions represent significant income potential for small-acreage farms, but only if you can store them properly. A well-managed storage system can extend your selling season from a few weeks to nearly a year, turning a summer harvest into steady winter revenue. The key lies in proper curing, maintaining ideal environmental conditions, and handling your crop with care.

Understanding the Curing Process

Curing is the critical first step that determines how long your garlic and onions will last in storage. This process dries the outer skins and necks, creating a protective barrier against disease and moisture loss.

Garlic Curing Basics

After harvest, brush off excess soil without washing. Hang garlic in bundles of 8-12 bulbs or spread on raised screens in a well-ventilated area away from direct sunlight. Ideal curing conditions are 75-85°F with low humidity and good air circulation. Hardneck varieties typically need 2-3 weeks, while softneck varieties require 3-4 weeks. The garlic is ready when the outer skins are papery and the roots are completely dry.

Onion Curing Methods

Onions require similar treatment but are generally more forgiving. Spread them in a single layer on slatted racks or screens, ensuring air can circulate around each bulb. At 70-80°F with good airflow, most onion varieties cure in 2-4 weeks. The necks should be completely dry and tight, with no green tissue remaining. Sweet onions cure faster but store for shorter periods than pungent storage varieties.

Creating Optimal Storage Conditions

Once cured, both crops need specific environmental conditions to maximize storage life.

Temperature and Humidity Requirements

Garlic stores best at 30-32°F with 60-70% relative humidity. At these conditions, most softneck varieties last 6-8 months, while hardneck types hold for 4-6 months. Onions prefer slightly different conditions: 32-35°F with 65-70% humidity. Storage onions can last 5-10 months under ideal conditions, while sweet onions typically last only 1-3 months.

Small farms without climate-controlled facilities can use insulated sheds, basements, or root cellars. Monitor conditions with a thermometer-hygrometer combo unit, which costs around $15-30 and provides essential data for storage management.

Ventilation Strategies

Stagnant air promotes disease and uneven storage conditions. Use these ventilation approaches:

• Install battery-powered fans to maintain gentle air circulation
• Stack storage crates or mesh bags with 2-3 inches of space between them
• Position containers away from walls to allow air movement on all sides
• Open vents during cool nights and close during warm days to regulate temperature

Storage Container Selection and Arrangement

The right containers protect your crop while allowing necessary airflow.

Container Options

Mesh bags work well for quantities under 50 pounds and allow excellent air circulation. Wooden or plastic slatted crates handle larger volumes and stack efficiently. Avoid solid containers that trap moisture. Hanging braids or bundles suspended from rafters maximize space in smaller storage areas and provide superior air exposure.

For farms selling through marketplaces like CuzHens, storing in market-ready quantities simplifies order fulfillment and reduces handling damage.

Stacking and Spacing

Never stack garlic or onions more than 2-3 feet high to prevent pressure damage to lower layers. Leave at least 4-6 inches between stacks for air circulation. Place the most mature or slightly damaged bulbs in easily accessible areas for early sale, reserving the highest-quality specimens for long-term storage.

Monitoring and Maintenance Practices

Successful storage requires ongoing attention throughout the storage period.

Regular Inspection Schedule

Check stored crops weekly for the first month, then bi-weekly thereafter. Look for:

• Soft spots indicating rot
• Sprouting, which signals improper temperature or humidity
• Mold growth on skins or between layers
• Shriveling from excessive moisture loss

Remove any compromised bulbs immediately to prevent spread to healthy stock.

Handling Best Practices

Minimize handling to reduce bruising and skin damage. When you must move bulbs, handle gently and avoid dropping them. Never store garlic or onions with high-moisture crops like potatoes or apples, as the ethylene gas and humidity will reduce storage life.

Trim dried tops to 1-2 inches above the bulb before long-term storage to reduce disease entry points, but leave them longer if you plan to braid or hang bundles.

Common Questions About Garlic and Onion Storage

Can I store garlic and onions together? Yes, but only if you can maintain conditions suitable for both. Since garlic tolerates slightly lower humidity than onions prefer, aim for 65% humidity as a compromise. Keep varieties separate for easier inventory management.

What causes stored garlic to sprout? Temperatures above 40°F trigger sprouting, especially after the bulbs have experienced a cold period. Maintain consistent temperatures below 35°F or above 50°F to prevent this dormancy break.

How do I know if my onions are too dry in storage? Some moisture loss is normal, but if outer skins become extremely brittle and inner scales start to shrivel, humidity is too low. Increase to 70% by placing shallow water pans in the storage area or using a humidifier.

Should I refrigerate garlic and onions on a small farm? Dedicated refrigeration works well if you have the space and can justify the energy cost. A used commercial cooler set to 32-35°F provides excellent control for farms storing 500+ pounds. Smaller operations often succeed with well-managed passive storage in insulated spaces.