Tips & Advies
Frosty flowers in a garden
4 MIN 26 Nov
Last update: 04 Dec 2023

How to Protect Your Plants from Frost: 4 Top Tips

Up your plant care game this winter. Explore quick & easy ideas to shield your plants from frost & ensure they thrive in chilly temperatures.

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Every gardener knows the importance of protecting their plants from frost, which damages leaves, flowers, and entire crops if left exposed. Fortunately, there are simple ways to protect your plants from low temperatures during the winter. Read on to find out how to protect your plants from frost?

From covering your plants with blankets, old carpets, or plastic to adding mulch, straw, or horticultural fleece, this blog shares four top tips about how to protect your plants from frost this winter. 

So, let’s go! 

What is frost? And why is it harmful to plants?

Frost occurs when moisture in the air freezes, creating tiny ice crystals which cling to surfaces, including your plants. 

And while it can be nice to look at, frost is the enemy of many garden plants: ice crystals will damage your plant’s cells, leading to wilting, discolouration, and even death. 

So, wrap your plants up nice and warm this winter, or bring them inside. 

This is how to wrap your plants for warmth:

Tip 1: Cover your plants with a blanket or plastic

Horticultural fleece covering brussel sprouts in the ground

Horticultural fleece is a lightweight, typically transparent, material designed to wrap around your plants, protecting them from harsh weather conditions and pests. 

Traditionally, gardeners used transparent polythene sheets with tiny perforations to aid air circulation. And while these are effective, they can cause overheating and lack nighttime insulation. 

So, these days, polythene has been superseded by polypropylene fleece (aka horticultural fleece), which is white-coloured, warm to the touch, and extremely lightweight. And with greatly improved insulation properties, horticultural fleece is ideal for tender plants, providing a layer of protection that helps them make it through the winter.  

Remember, whatever you use to cover your plants, ensure daylight can still get through. 

Tip 2: Add mulch or straw to protect the roots

Person holding mulch in their hands

A horticultural fleece or plastic sheet helps the tender plant upper, but what about the roots?

Because if the soil freezes, so do your plant’s roots. And while some plants are more frost-resistant than others, keeping the earth warm around the root network is a good idea.  

So, add a layer of mulch, such as straw, wood chippings, leaf mould, or compost, which will help protect the soil from frost.

Mulch has a range of benefits:

  • Keeps the soil warm
  • Helps prevent weeds
  • Feeds the soil

Indeed, if you add a layer of organic mulch around a plant’s base, it keeps the soil warm and feeds the earth at the same time.

Find out everything you’ve ever wanted to know about mulch (but were afraid to ask).

Tip 3: Warm up the soil

If your garden is prone to freezing in winter, consider installing an under-soil heating system. And while this might sound like a luxury more associated with premier league football stadiums, under-soil warming cables are surprisingly inexpensive. 

Soil heating systems are particularly effective in greenhouses but offer adequate soil frost protection for your flowerbeds as well. 

These simple devices look like an extended length of power cable that you bury underneath the soil surface, providing up to 40ºC of warmth. And while we’re all conscious of our electricity spend at the moment, a 3m cable typically uses just 27W of power, costing around 17p a day.

Tip 4: Frost-resistant planting

Frost-covered lavender against a white sky

Covering your plants with fleece and mulch can be time-consuming. So, the other alternative is to choose frost-resistant plants, which will survive exposure to some frost without much trouble. 

These are some of the best frost-resistant plants:

Frost resistant veg

  • Cabbage
  • Spinach
  • Parsnip
  • Radish
  • Cauliflower
  • Brussel sprouts
  • Turnip
  • Celery
  • Sage
  • Rosemary
  • Potato
  • Kohl rabi

Flowerbed plants

  • Pansy
  • Lavender
  • Holly
  • Lily of the Valley
  • Peony
  • Hellebore
  • Crane’s bill
  • Showy Stonecrop
  • Echinacea
  • Bee balm
  • Wild Columbine
  • Coral bells
  • Siberian Iris
  • Moonbeam Coreopsis
  • Baptisia
  • Catmint
  • False sunflower
  • New England Aster
  • Hosta

Bonus tip!

If your soil is prone to flooding, add plenty of organic matter to aid drainage. Because waterlogged soil is more susceptible to freezing. 

How to Protect Your Plants from Frost

Thanks for reading my four top tips for protecting your plants from frost. I hope I’ve provided enough information to help.

But if you have any questions, don’t hesitate to get in touch

Or explore our comprehensive Help & Advice section for expert gardening and lawn care tips,

Thanks for reading. 

Louis Hooft
Founder & Lawn expert
Introducing Louis Hooft, the founder of MOOWY and your reliable expert. With a profound love for stunning lawns and extensive experience in garden maintenance, Louis is here to assist garden enthusiasts in achieving a greener and livelier outdoors than ever before. Count on Louis for invaluable tips, clever tricks, and top-notch products to make your garden flourish!
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