Perennial Wisdom

It is important to clean and protect gardening pots, containers, and tools when they are not in-use. Improperly stored pots may crack or break when exposed to winter’s freeze and thaw cycles, and dirty garden containers and equipment may transfer pests and diseases to other plants. Here are autumn tips on how to clean and store garden supplies for the winter so you can keep calm and pot on when spring comes around.

The primary method to clean pots and tools is to use bleach. Clean all the debris off the tool or container using warm, soapy water, and a brush or rag. Make enough of a bleach solution, using one part bleach and nine parts water, to immerse part or all of an item, preferably for at least 10 minutes. Once all of the item has been in the bleach water, rinse it with water and fully dry it before storing. Pots should be dried in an upside-down position.

Some may want another option as bleach is not recommended for tools that require a sharp edge because it may corrode it. Alternative methods include steam or dry heat (180-200°F for 30 minutes under a cover to contain the heat), rubbing alcohol (70% or higher, dip or swab and then let dry without rinsing), or hydrogen peroxide (dip, spray, or brush on or soak). 

All plant containers could have an extended life if placed in storage or under protective covering rather than outside. Unglazed clay or concrete pots should be stashed in a protected, dry area that stays above freezing. Place lighter pots inside heavier ones, using dividers made of foam or cardboard to prevent them from getting stuck or breaking one of the pots. Plastic pots should be stored upside down in an enclosed area or covered with a tarp outside to protect them from the elements and direct sunlight. Grow bags should not be exposed to sun or moisture during storage, and should be hung out of reach from pests. Remaining containers of fertilizer and potting soil should be stored in airtight containers or tightly sealed to keep them dry. Tools should be stored in a dry location. You can oil your tools to prevent them from rusting using plant safe oil.

The WSU Extension Master Gardener Program trains volunteers to be effective community educators in gardening and environmental stewardship. Master Gardeners provide information generated from research at WSU and other university systems. Christine Gile, a biologist who lives in Loon Lake, is a current Master Gardener.