How to protect your plants from frost, freezing temperatures

CHARLOTTE, N.C. (WBTV) - If there’s one thing we know about living in the Carolinas, it’s that the weather can change in a hurry.

One day, you’re outside enjoying a beautiful, sunny afternoon. The next, you’re waking up to frost covering your lawn and garden.

And if you’ve spent the spring and summer planting, watering, and watching your garden grow, the last thing you want is to lose your plants to an unexpected freeze.

But here’s the good news.

A little preparation can make a big difference.

And protecting your plants from freezing temperatures might be easier than you think.

Give your plants a drink before the freeze

This might sound surprising, but one of the best things you can do before a frosty night is water your garden.

That’s right. Water!

Moist soil holds heat better than dry soil.

During the day, the ground absorbs warmth from the sun. Soil that contains adequate moisture can store and transfer more of that heat, helping moderate temperature changes around your plants overnight.

That’s why I recommend checking your garden beds, planters, and containers the morning or early afternoon before freezing temperatures arrive.

If the soil is dry, give it a good, thorough watering.

Watering earlier in the day gives the moisture time to soak into the soil before temperatures begin dropping.

And here’s an important detail: you’re watering the soil, not spraying the leaves or flowers.

You want the roots and surrounding soil to have adequate moisture without leaving your plants unnecessarily wet as temperatures fall.

Just be careful not to overwater. If your soil is already moist, you don’t need to add more.

The goal is moist soil, not soggy soil.

And while this can provide a little extra protection during a light frost, watering alone won’t save a tender plant from a hard freeze.

That’s where our next tip comes in.

Tuck your plants in for the night

Think about what you do when temperatures start dropping.

You grab a blanket!

Well, your plants can benefit from a little extra covering, too.

Before a frosty night, use a lightweight blanket, sheet, frost cloth, or other breathable fabric to cover plants that need protection.

The covering helps trap some of the warmth rising from the ground, creating a slightly warmer environment around the plant.

But here’s something important.

Don’t just throw a heavy blanket directly over your flowers.

The weight of the fabric can bend delicate stems, crush blooms, or leave plants looking wilted and damaged.

Instead, try placing a sturdy stick, garden stake, or small support frame around or above the plant.

This helps hold the fabric up and keeps it from pressing down on the foliage.

Then drape your covering over the support, making sure it reaches all the way to the ground.

Secure the edges with rocks, bricks, or garden staples so cold air can’t easily blow underneath.

That last part matters!

You want to capture some of the warmth coming from the soil, not simply wrap the leaves.

And if you’re using a blanket or sheet, make sure it’s secure enough that the wind won’t blow it away overnight.

Don’t forget your potted plants

Containers deserve a little extra attention when temperatures drop.

Unlike plants growing in the ground, potted plants have roots surrounded by a relatively small amount of soil.

That soil can cool much faster than the ground around an established garden bed.

If you can, move smaller planters closer to your house, onto a sheltered porch, or into a garage during particularly cold nights.

Just remember that a covered porch isn’t always warm enough to protect tropical plants during a hard freeze.

If you can’t move your containers, group them together in a sheltered spot and cover them with frost cloth.

You can also insulate the outside of larger pots to help protect their roots.

For especially cold weather, bringing sensitive plants indoors may be your safest option.

Remember to uncover them

Here’s one final step that’s easy to forget.

Take the covers off once temperatures rise above freezing the next morning.

Plants still need sunlight and airflow, and leaving heavy coverings on during a warm, sunny day can cause them to overheat.

If another freeze is expected that night, you can simply cover them again in the evening.

It’s a little extra work, but it can help protect the plants you’ve spent so much time growing.

Every plant is different

Not every plant in your garden needs the same amount of protection.

Some native perennials are perfectly adapted to our Carolina winters. They may die back aboveground, but their roots remain alive beneath the soil, ready to grow again in spring.

Other plants, especially tropical and warm-season annuals, can suffer damage when temperatures approach freezing.

And that’s okay.

Part of gardening is learning which plants can handle the cold and which ones need a little help.

You don’t have to protect every leaf in your garden.

Sometimes, allowing a perennial to go dormant is exactly what nature intended.

Little preparation goes a long way

One of the things I love about gardening is that every season teaches us something new.

Spring teaches us patience. Summer teaches us resilience. And winter reminds us that even when things look quiet, there’s still life beneath the surface.

So the next time you see freezing temperatures in the forecast, don’t panic.

Check your soil. Give dry plants a drink early in the day.

Grab a few blankets or frost cloths.

And give your more sensitive plants a little extra protection for the night.

Because sometimes the smallest steps can make the biggest difference.

Start small… and let it grow.

❄️ Quick Guide: Protecting Your Plants From a Freeze

• 💧 Water early: If the soil is dry, water the morning or early afternoon before the freeze.
• 🌱 Moist soil holds heat: Adequately moist soil stores and transfers heat better than dry soil, which may help during a light frost.
• 🚫 Don’t overwater: If the soil is already moist, leave it alone. Saturated soil can damage roots.
• 🛏️ Cover sensitive plants: Use frost cloth, a lightweight blanket, or a breathable sheet.
• 🪵 Use supports: Stakes, rods, or a small frame help keep heavy fabric from bending stems or crushing flowers.
• 🧱 Secure the edges: Bring the covering to the ground and weigh down the edges to retain warmth.
• 🪴 Protect containers: Move sensitive potted plants to a sheltered location or indoors when necessary.
• ☀️ Uncover the next day: Remove coverings after temperatures rise above freezing to prevent overheating.
• 🌿 Know your plants: Hardy perennials may need no protection at all, while tropical plants and tender annuals may need to come inside.

👉 Best advice: Prepare before sunset, when temperatures are still above freezing. Don’t wait until frost has already formed.