Growing Garlic in Warmer Climates

At Keene Garlic, we’re based in Wisconsin, where cold winters naturally provide the conditions garlic needs to thrive. However, through research and feedback from growers across the country, we’ve learned what works best in warmer regions so you can still achieve a successful harvest—even without a true winter. Although growing garlic in a warmer climate can feel a little tricky— with the right approach, it’s absolutely possible to produce large, healthy bulbs.

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Why Growing Garlic Is Different in Warm Climates

Garlic is naturally adapted to cold climates. When planted in the fall in northern regions, it experiences a long period of cold temperatures while in the ground. This natural chilling period triggers proper bulb development in the spring.

In warmer climates, that cold period doesn’t always happen—and without it, garlic may struggle to form full bulbs. Instead, growers may end up with small heads or single-clove “rounds.” That’s where vernalization comes in.

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What is Vernalization (and Why It Matters)?

This cold exposure is what signals the plant to divide and form fully developed bulbs. Without it, the plant may still grow leaves, but bulb formation will be limited.

For growers in warm or southern climates, vernalization is often the difference between a disappointing harvest and a strong, productive one.

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Do You Need to Vernalize Garlic?

You may not need to vernalize if:

• You plant in the fall and
• Your region consistently experiences temperatures below 40°F for at least 40 days

In these conditions, nature takes care of the process for you.

You would likely see benefits from vernalizing garlic if you:

• Live in a warm or southern climate (USDA Zones 8+)
• Don’t experience extended cold winters
• Plan to plant garlic in late winter or spring

💡Keene Garlic Tip: Softneck, Creole, Purple Stripe, and Turban varieties tend to tolerate warmer climates better than Porcelain or Rocambole types—but even they benefit from proper cold exposure.

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How to Vernalize Garlic (Step-by-Step)

The good news? Vernalizing garlic is simple and can be done at home using your refrigerator.

1. Keep Bulbs Whole

2. Refrigerate

Store the bag in the crisper drawer of your fridge. Keep it away from fruits like apples or bananas, which release gases that can impact growth.

3. Chill for 6–8 Weeks

• Minimum: 40 days
• Ideal for warm climates: 6–8 weeks
• Very warm regions: up to 10–12 weeks

Check bulbs occasionally to make sure they stay firm and mold-free.

👍Important Tip

Don’t remove the bulbs from the fridge until you are ready to plant. Once they warm up, they’ll begin sprouting quickly.

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Best Growing Practices for Garlic in Warm Regions

Vernalization is just one piece of the puzzle. To grow great garlic in a warm climate, your growing conditions matter just as much.

1. Start with the Right Soil

Garlic prefers:

• Loose, well-draining soil
• Soil rich in organic matter

If your soil holds water, consider building raised beds to improve drainage. Garlic does not tolerate waterlogged conditions.

2. Provide Full Sun and Consistent Moisture

Garlic needs:

• ☀️At least 8 hours of direct sunlight daily
• 🌧️Even moisture (not overly wet or dry)

The goal is to keep soil consistently moist—not saturated.

3. Adjust Your Planting Timing

While mid-October is standard in cooler regions, warm-climate growers often benefit from planting slightly later, after soil temperatures begin to cool.

This helps prevent premature growth and improves bulb development.

4. Keep Soil Cool as Temperatures Rise

To protect your crop:

• Apply thick mulch (this is essential)
• Use shade cloth if needed
• Water lightly and consistently

Mulch is especially important—it helps regulate soil temperature and prevents early bulbing, which can lead to smaller heads.

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Why Vernalization + Soil Management = Success

Growing garlic in warmer climates comes down to two main factors:

1. Proper cold exposure (vernalization)
2. Maintaining cool, healthy soil during growth

When you combine these, you give your garlic the signals and environment it needs to form large, well-developed bulbs.

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Final Thoughts: Growing Garlic Anywhere

Even though garlic naturally prefers colder climates, growers across the southern U.S. and other warm regions are producing excellent crops every year. With a little preparation—especially taking time to properly vernalize your seed garlic—you can do the same.

And remember, local conditions always matter. For best results, it’s helpful to check with your local extension office or Master Gardeners group for region-specific advice.

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Ready to Grow Garlic Successfully in Any Climate?

Starting with high-quality seed makes all the difference. Explore our selection of premium garlic at Keene Garlic and give your garden the best possible start.