The Best Greenhouse for Hail

If you live in hail country, you know how quickly the weather can change. One minute, your garden is thriving. The next, dark clouds roll in, hail starts falling, and months of hard work can be damaged in just a few minutes.

Whether you garden in the Rockies, the Plains, the Midwest, or another storm-prone region, your greenhouse needs to do more than look beautiful. It needs to protect your plants, your food supply, and your long-term investment.

Growing Dome Greenhouses are designed for real weather. With a geodesic frame, 16 mm 5-wall polycarbonate glazing, and over 35 years of innovation behind the design, they offer a durable, energy-efficient growing space for gardeners who face hail, high winds, snow, and sudden temperature swings.

Planning a greenhouse in hail country?

Compare our weather-resistant greenhouse kit or request a quote to find the best Growing Dome for your climate.

Why Choosing a Hail-Resistant Greenhouse Matters

Hail is not a rare weather event in the United States. According to the Insurance Information Institute, citing NOAA’s National Weather Service Storm Prediction Center, the U.S. recorded 5,432 hail events in 2025, up from 5,373 in 2024. NOAA’s Storm Events Database also tracks hail by county, making it a helpful resource for gardeners who want to understand local severe-weather risk before investing in a greenhouse.

That is a lot of storms, and a lot of potential damage.

Hail can shred leaves, bruise fruit, break tender stems, flatten seedlings, and destroy traditional greenhouse coverings. Glass can shatter. Thin plastic film can tear. Fiberglass can crack or puncture. Once the covering is compromised, your plants, equipment, and garden beds are exposed.

For many gardeners, a greenhouse is not just a seasonal hobby structure. It is a food source, a sanctuary, and an investment in self-reliance. So when you are comparing greenhouse kits, it is worth asking one very practical question: Will this greenhouse hold up when the weather gets serious?

Hail-Resistant Polycarbonate Glazing

Traditional greenhouses often use glass, fiberglass, or thin plastic film coverings. These materials can work well in mild climates, but they are not always the best choice for hail-prone regions.

Growing Dome Greenhouses are built differently. Every Growing Dome includes 16 mm, 5-wall polycarbonate glazing. This high-impact material offers strength, insulation, and light diffusion, making it one of the best greenhouse covering options for hail protection. According to A&C Plastics, multiwall co-extruded thermoglazing has high impact resistance and is cited as 200 times stronger than glass and 10 times stronger than acrylic.

Polycarbonate is also designed to flex under pressure rather than shatter like glass. This gives your greenhouse a thicker, more forgiving layer of protection during sudden hailstorms and severe weather.

What Greenhouse Coverings Actually Do in Hail

When gardeners ask us about the best greenhouse for hail, they are usually not asking a theoretical question. They want to know what will happen when a storm rolls in and ice starts hitting the roof. Different greenhouse coverings respond very differently under impact.

For gardeners in hail-prone regions, the biggest difference is not just whether the material survives one storm. It is whether your greenhouse keeps protecting your plants year after year.

That is why Growing Dome Greenhouses use 16 mm, 5-wall polycarbonate glazing. It provides a stronger barrier than glass, thin film, or lightweight plastic coverings, while also improving insulation and light diffusion inside the greenhouse.

Why Dome Shape Helps in Hailstorms

The glazing is a big part of the story, but the shape of the greenhouse matters too. A Growing Dome is not a flat-roofed greenhouse. Its geodesic design uses interconnected triangles to create a strong, stable structure. The curved shape helps wind move around the greenhouse instead of pushing against broad, flat walls. It also helps snow slide off more naturally and reduces the amount of weight that can sit on the structure after a storm.

This same shape is helpful in hail-prone regions. Hail is less likely to collect on a curved, sloped surface than it is on a flat roof. And because the dome distributes stress through its geodesic frame, the structure is better prepared for sudden, unpredictable weather. That combination of shape and glazing is what makes the Growing Dome one of the best greenhouse kits for harsh climates.

Proven Performance in Real Weather

We can talk about materials and engineering all day, but real-world experience is what gives gardeners peace of mind. Growing Dome owners across the country have experienced how durable their structures are during real storms.

Claudia Stover, a double Dome owner living at nearly 8,000 feet in Colorado’s Rocky Mountains, faces unpredictable weather and frequent hailstorms.

"I never worry about hail or violent storm activity on my domes. They are actually a great spot to tuck into during a quick-rising storm. Love these domes."

That kind of first-hand experience matters. Claudia gardens in a high-altitude climate where sudden storms are part of life. Her Growing Domes are not just beautiful garden spaces. They are trusted shelters for plants and people when the weather turns.

Another powerful example comes from John and Barbara Eychaner in Banner, Wyoming. After a severe hailstorm in May 2013, they reported damage to their house roof, skylights, rain gutters, and a steel pole building. Some hailstones were close to softball-baseball size. But their 22-foot Growing Dome greenhouse had no hail damage. You can read their full story here: Growing Dome Survives Baseball-Sized Hail.

Stories like these show a consistent pattern. When traditional materials fail, Growing Domes continue protecting gardens in real weather.

What Happens If You Do Get Hail Damage?

Even the most durable greenhouse materials can experience damage from exceptionally large, fast-moving, or unusual hail. That is why warranty coverage, replacement parts, and insurance are important pieces of the buying decision.

Gallina USA manufactures the polycarbonate panels used on Growing Domes and provides a 10-year limited warranty against excessive weathering and hail impact when panels are properly installed and maintained.

How the Gallina Warranty Works

• Coverage: The warranty applies to Gallina Policarb® multiwall sheets and ArcoPlus® modular panels that are at least 6 millimeters thick when correctly installed, handled, and maintained.
• Hail Impact Test: Warranty coverage is based on a test in which a 20 millimeter diameter sphere strikes the sheet at 21 meters per second without breakage.
• Pro-Rated Replacement: If damage is covered, Gallina provides replacement material at a declining rate. It covers 100% up to year five, then 75% in year six, 60% in year seven, 45% in year eight, 30% in year nine, and 15% in year ten.
• Exclusions: The warranty does not cover installation labor, shipping, or damages caused by vandalism, misuse, or improper installation.
• Claim Process: Claims must be submitted to Gallina within 10 days of discovering the defect and should include documentation such as the invoice, product identification, warranty certificate, and photos. Gallina may request an inspection or a sample of the material before approval.

What This Means for Greenhouse Buyers

Warranty coverage matters because hail protection is not only about surviving one storm. It is about protecting your plants, your food supply, and your long-term investment. If a storm causes damage beyond warranty limits, replacement panels are available for purchase directly from Growing Spaces. Having access to replacement parts allows you to repair quickly and get back to growing without a long delay.

It is also a good idea to include your greenhouse in your homeowner’s or property insurance policy. This can provide additional protection and peace of mind for severe weather events that fall outside the manufacturer’s warranty. With Gallina’s warranty, available replacement panels, and proper insurance coverage, you can feel more confident that your investment is protected.

Why Growing Domes Are Among the Best Greenhouses for Hail

When comparing greenhouse types, it is easy to see why so many gardeners choose the Growing Dome for hail-prone regions.

The Growing Dome combines:

• 16 mm 5-wall polycarbonate glazing
• A strong geodesic frame
• A shape that helps shed snow and reduce storm stress
• Passive solar design
• Thermal mass from the above-ground pond
• Replacement parts and long-term customer support

It is a complete growing system designed for gardeners who live with real weather. Our Growing Dome designs were born in the Rocky Mountains, where high altitude, dry air, cold nights, intense sun, snow, hail, and sudden storms shaped the greenhouse we manufacture today. That experience continues to guide the way we help customers choose the right structure for their climate.

Ready for a Greenhouse That Can Handle Hail?

If hail, high winds, snow, or sudden weather changes are part of your climate, choose a greenhouse designed for real-world conditions. Whether you are growing vegetables, tropical plants, flowers, herbs, or food for your family, your greenhouse should give you confidence when the forecast changes.

Frequently Asked Questions About Hail-Resistant Greenhouses

Are Growing Domes hail proof?

No greenhouse can honestly promise to be completely hail proof in every possible storm. Hail varies in size, speed, density, and wind direction, and extreme storms can damage almost any outdoor structure.

That said, Growing Domes are designed to be highly hail resistant. Their 16 mm, 5-wall polycarbonate glazing is much stronger than glass, thin plastic film, or lightweight panels. The geodesic shape also helps reduce broad, flat surfaces where hail, snow, and storm pressure can collect.

For gardeners in hail-prone regions, that combination offers a much stronger layer of protection and peace of mind.

What is the best greenhouse material for hail?

For long-term greenhouse protection, multiwall polycarbonate is one of the best materials for hail-prone climates. Unlike glass, which can shatter, polycarbonate is designed to flex under pressure and absorb impact.

The thickness also matters. A thin panel will not perform the same way as a thicker, multiwall panel. Growing Domes use 16 mm, 5-wall polycarbonate glazing because it provides strength, insulation, and light diffusion for year-round growing.

What happens if hail damages my Growing Dome?

If hail damages a panel, you are not stuck replacing the whole greenhouse. Replacement panels are available through Growing Spaces, and depending on the type of damage, installation, maintenance, and warranty conditions, Gallina’s limited warranty may apply.

We also recommend documenting the damage right away with photos and checking your homeowner’s or property insurance policy. Some severe weather damage may be better handled through insurance than through the manufacturer warranty.

Should I insure my greenhouse against hail?

Yes. If you live in hail country, adding your greenhouse to your homeowner’s or property insurance policy is a smart step.

The Gallina warranty provides important product protection, but no manufacturer’s warranty covers every possible storm scenario. Insurance can help protect your full investment, including damage that may fall outside warranty limits.

Before storm season, ask your insurance provider how your greenhouse is classified and what documentation they need.

Is a Growing Dome good for wind and snow too?

Yes. Growing Domes are designed for more than hail. Their geodesic shape helps distribute stress, the sloped surface helps shed snow, and the 16 mm polycarbonate glazing provides insulation for cold nights and shoulder seasons.

If your climate includes hail, wind, snow, intense sun, or sudden temperature swings, a Growing Dome gives you a more complete weather-resistant growing system than a traditional flat-roof greenhouse.