Best Frost Blankets for Covering Plants & Trees During Winter

Plants Winter Frost

Is your area expecting colder-than-usual temperatures? Make sure you plan ahead and provide the appropriate protection for your outdoor garden plants by using frost blankets to shield them against the bitter cold.

Best Frost Blankets for Plants

Frost blankets are vital for outdoor gardeners who live in areas where temperatures can dip below 32°F. This is the point when ice crystals can start to form on outdoor plants and trees. Here are some frost blankets we recommend for gardeners who are preparing for the winter season.

Frost Blanket Plants

DeWitt Plant Frost Protection

The DeWitt Plant Frost Cloth comes in four different options: 1.5 oz, 2-pack, 3-pack, and 4-pack. It is a suitable option for gardeners who are looking to provide frost protection for annual flowers and bedding plants. Each cloth has a size dimension of 6-feet by 50-feet, which is ample enough to cover small to medium-sized garden beds.

Easy Gardener Plant Protection Blanket

The Easy Gardener blanket provides up to eight degrees of frost protection and in addition to garden beds can also provide decent frost protection for small shrubs and bushes. Each blanket measure 10 feet by 12 feet. You also have the benefit of re-using this blanket season after season (as long as you maintain it under good conditions).

Best Frost Blankets for Trees

Frost blankets for trees require different specifications due to the height of the trees. These blankets and covers work best for young trees that aren’t strong enough to handle the bitter frost of winter. Make sure you get the dimensions right before you order a tree frost blanket.

Remiawy Shrub Jacket

The Remiawy Shrub Jacket can cover young trees and shrubs up to a size of 75″ (height) by 85″ (width). The zipper and drawstring system allow you to easily secure the cover over the tree. This reduces any worry of the cover being flown away by the winter wind.

Tierra Garden Fleece Jacket

The Tierra Garden Fleece Jacket is designed to provide quick frost protection, while still allowing plants and trees to “breathe” in order to maintain healthy growth. Many plants can die underneath frost blankets if the blanket doesn’t allow some air and moisture to filter through.

What is a Frost Blanket for Plants?

Frost blankets are pieces of fabrics (typically made of polypropylene material) that are designed to create an insulating heat pocket underneath the cover. The heat typically comes from the soil. The material used for frost blankets are also designed to allow sunlight and water through.

Frost blankets are one of several ways for outdoor gardeners to winterize their garden bed. They offer an alternative to plastic covers, which come with their own pros and cons. Plastic is a lot more lightweight and easier-to-use, but it doesn’t offer much insulation for the leaves that are in direct contact with the plastic cover.

What Temperature do You Need to Cover Plants?

You want to make sure you only use frost blankets when it is needed. Otherwise, your garden plants can suffocate if the air temperature is too warm. Typically, a good time to use a frost blanket would be when temperature is expected to drop below 32°F.

The slightest of freeze or frost can cause widespread damage to your plant so it’s vital to pay close attention to the upcoming weather report. Ideally, you want to install the frost blanket a little ahead of time so that enough heat is getting insulated underneath the blanket by the time temperatures reach frost point.

When Can I Uncover My Plants After a Frost?

Is the temperature expected to bounce back beyond frosting point? Ideally, you want to remove the frost blanket as soon as possible (early in the morning) before the sun has fully risen and when the temperature feels reasonably warm. The space underneath the blanket will get really toasty and the poor plants may get baked and not be able to return to full health.

Can I Use Bubble Wrap to Protect Plants from Frost?

Are you in a situation where it’s too late to get a proper plastic cover or frost blanket and the only thing that’s left at home is a bubble wrap? The good news is that bubble wrap can provide frost protection to a certain degree. It’s just not as effective as a frost blanket.

You can wrap the bubble wrap around container plants. Make sure the bubble wrap is tightly secured with strong tape so it doesn’t get blown away by the wind. You should try and cover the plant from top to bottom. It’s especially important to protection the roots of the plant.

Can Frost Damaged Plants be Saved?

Some plants, despite being covered, may still get damaged by the frost due to a number of reasons (e.g. temperature gets too cold, blanket wasn’t properly secured). There is a good possibility of saving plants that suffer from light frost but the same unfortunately can’t be said for plants that have been damaged by hard frost.

Cold-damaged plants can be saved through a number of methods, such as moving the plants indoor (if it’s a container plant), pruning away dead stems and leaves, and adding the appropriate liquid fertilizer to aid the plant’s growth. Each plant needs to be treated on a case-by-case basis.

Ultimately, gardeners will find themselves in a better situation by preventing and not curing plants that suffer from the cold. Be proactive and make sure you have frost blankets ready for your plants in case the temperature starts to creep lower and lower.