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Preparing Container Plants for Winter

Category Seasonal
Containers provide less protection for your plants than if they were planted in the ground. The upside is that they are portable. This is a guide about preparing container plants for winter.
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October 16, 2008

I live in a townhome and have a porch and patio to display flowers. Each fall before it freezes I bring a bunch of my plants inside, pots and hanging baskets of geraniums, especially. I place them around a window in a spare room that gets pretty good light. They drop a lot of leaves at first, but gradually get accustomed to the indoor conditions. In the spring I take them back out again. I save so much money by not having to replace these plants every year. This year I started nasturtium, zinnia, and vinca from seed in several pots and they turned out so pretty - the cost of the seeds is small. Every year I have a super nice display of flowers and it costs me hardly anything!

By Holly from Denver, CO

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October 21, 20110 found this helpful

For most of us, the first hard frosts of fall mark the end of container gardening season. Here are some tips for tidying up your dead or dormant plants, moving your favorites indoors, and cleaning up and storing your containers for the winter.

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Relocating Tender Plants Indoors

If your containers include tropical plants or tender perennials that you plan to overwinter indoors, start getting them used to their new environment well in advance of freezing temperatures, (and before you turn on your home's heating system). Water them well and set them in a shady, protected spot for a few days before bringing them indoors. During this time, check them over carefully for signs of pest problems and treat them with an insecticidal soap if necessary.

Decide which plants are worth saving. Although it is tempting to bring all of our container plants indoors for the winter, most of us simply don't have the space. To help decide which plants are worth saving, ask yourself the following questions:

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Protecting Hardy Perennials

If you are growing hardy perennials and are willing to risk losing them, just water them enough to prevent them from drying out and let them be. If you can't risk losing them but you don't have room for them indoors, here are several ways to increase the odds that they will survive outdoors:

Cleaning and Storing Containers

Soil expands as it freezes, and even the best containers will crack if soil is left in them over the winter. Your containers will last much longer if you empty them out and store them inside. If they are light enough to move, dump any remaining plant debris and potting soil into your compost pile, and scrub containers with a stiff brush or scouring pad to remove any remaining dirt.

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Finally, rinse them with a solution of one part bleach to nine parts water and let them air dry. Containers should be stacked upside-down in a frost-free environment like a basement, garden shed, or garage. Weatherproof containers (not ceramic or thin-walled terra cotta) can be turned over and left outside, providing you remove the potting soil.

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Questions

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By 0 found this helpful
May 23, 2010

I want to grow mint in a container outdoors above ground, but I'm concerned about winter storage. There is no room in the apartment, will it winter in a shed with protection? If so, what steps can be taken?

Hardiness Zone: 5a

By Susan from Winooski, VT

Answers

May 26, 20100 found this helpful

Possibly. Maybe nestle the pot in a bin of straw or rags for extra insulation?
Do you have room for a 4-inch pot on the windowsill this winter? Mint is very easy to root. I'd suggest you hold a cutting over inside the first winter as backup till you know if the shed storage will be sufficient.

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May 26, 20100 found this helpful

It's been my experience you can't kill mint. That's why I keep mine in a container too. It just takes on a life of it's own and look out!

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