It is an easy way to prolong the growing season both spring and fall. You can also wrap them in insulation or move them into an unheated greenhouse or shed when very cold temperatures are expected. As day turns into night, plants quickly begin to lose all their stored heat. It’s about 10-25* degrees warmer under cover than the outside air depending on the type of cover you’ve used. If possible, you should lift the containers off the ground to help the soil drain well and surround them with jugs of hot water to keep them warm. Well-watered plants are less susceptible to frost damage, advises Marin Master Gardeners. Snap them off, and either set them in a cup of water or a container of soil. Your plant cooking is not a good thing. Add Mulch to Pots. Cluster container plants close together and, if possible, in a sheltered spot close to the house. When to protect plants. Made of breathable fleece, it should protect to 17.6 degrees Fahrenheit (-8 degrees Centigrade). … Protect pots from frost by moving them against the house, where the temperatures will be warmer. Plants cells that have taken up water are stronger than those without. Use bedsheets - they can always go in the wash when the weather breaks. Group pots closely together so they help insulate each other and raise them on pot feet (or bricks) to let rainwater drain. Exotics in containers can be moved inside, but established plants will need protection in situ. (You can cut hula hoops from the dollar store in half and make hoops for row covers. Old newspaper can be used to protect plants from frost. Gather potted plants together and place them close to each other. Cover Your Plants: Generally, covering plants to create a temporary pocket of warmer air is the best way to protect them. If plants are too large to be indoors, tightly wrap the pots in bubble-wrap or hessian to protect the roots from frost. Apply mulch on top of the soil, up to the rims of the pots. If temperatures drop below freezing, a greenhouse might not protect the plants from frost. Warm weather holds on for Sunday, but it turns colder and stormier on Monday. Use empty pots to protect your plants. During the day, the soil absorbs the heat from the sun. Still, sometimes when the ground gets frozen and roots can’t pump water to twigs and leaves, a cold, steady wind or lots of sun can dry plants out and cause leaf burn and twig damage. Protecting container plants in winter When protecting potted plants in winter, the aim is to provide extra insulation for the roots, stop the soil getting waterlogged, and give added protection for any frost-tender or tropical plants. Make sure that plants are still getting the required sun if you keep them indoors during the day. However, many perennial plants such as roses, peonies, and hibiscus can also be grown outdoors in containers and kept alive through winter. You can also cover your plants with an old blanket, drop cloth, or tarp to protect them from a quick frost, but don't forget to uncover them during the day to allow ventilation! Tomatoes and peppers loathe cold weather - they’re tropical plants. If you live in a climate with cold winters, you’re familiar with the regimen of moving potted plants indoors before the first frost. For added protection when you protect plants in a freeze, you can place plastic over the sheets or blankets to help keep warmth in. Be creative with your covers. Then clip your plastic to the hoop.). Place the open side of cardboard boxes up and over the pots, making sure they are large enough that they don’t touch the foliage. Copyright 2020 WWBT. Lowe’s and Home Depot carry 6 mil plastic in the paint department. 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