Even “hardy” clay pots should not spend the winter outdoors without precautions leaving clay pots outdoors during the winter months can be detrimental to the pots and potentially harm the plants inside them. It’s the same thing that causes potholes to form in the road If you leave the soil in your containers and moisture gets in the soil, the soil can freeze and expand, damaging your pots
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Even resin (plastic) pots can get freeze damage and crack open.
Clay pots are a popular choice for container gardens and potted plants, but they aren't made for harsh, winter weather
If clay absorbs too much moisture, it will crack and break. One way to ensure the longevity of your pots is to keep them protected during winter, as the cold temperatures can cause them to crack From terracotta pots to grow bags, our gardening experts show you how to winterize your garden containers so they remain in top shape for seasons to come. The best way to protect your picky pots from the winter temperatures is to switch them out for pots better able to withstand the climate, such as ceramic and treated pots, or to clean up your terracotta pots ready to store and change to pots labelled as 'frost proof'.
It is not recommended to leave them outside during the winter, as they are likely to sustain damage Glazed ceramic pots are constructed with a coating of glass fused to the clay This provides an extra layer of protection against the elements and can help prevent moisture from seeping into the pores. Before storing or sheltering your pots for winter
Remove all soil and plant debris from inside and outside the pots
Use a soft brush and mild soapy water to clean off dirt and algae Rinse thoroughly with clean water Allow the pots to dry completely in a warm, sunny spot. Terracotta or clay pots cannot be stored outdoors
Since they are porous and retain some moisture, they are prone to cracking because the moisture in them will freeze and expand several times over the course of the winter. Yes, clay pots can crack during the winter As water freezes, it expands causing fissures and cracks in your pots
