Should I remove planters from my deck before winter in Campbellton NB?

Yes, you should remove all planters from your deck before winter arrives in Campbellton. Leaving planters in place through a northern New Brunswick winter creates several problems that can shorten the life of your deck and damage the planters themselves.

Campbellton regularly sees winter temperatures dropping to -25C or colder, with seasonal snowfall averaging around 300 cm. When soil inside a planter freezes, the water in that soil expands with tremendous force. Ceramic and clay pots will crack or shatter outright, but even resin and composite planters can split along seams when subjected to repeated freeze-thaw cycles over a 5-month winter. The cost of replacing a set of quality planters every spring adds up quickly.

The more important concern is what planters do to your deck surface. A planter sitting in the same spot all winter traps moisture against the decking. Snow and ice melt collect underneath and around the planter base, and because airflow is blocked, that moisture never evaporates. On a pressure-treated wood deck, this constant moisture contact accelerates rot and creates dark discolouration stains that are extremely difficult to remove. On composite decking, trapped moisture promotes mould and mildew growth on the underside of the planter zone, which can leave permanent marks on lighter-coloured boards.

The weight factor matters too. A large planter filled with wet soil can weigh 50 to 100 pounds or more. Add the weight of accumulated snow and ice on top, and you are placing a concentrated load on a small area of your deck for months. This sustained point-loading can cause individual deck boards to warp or sag, and on older decks with softening joists, it contributes to structural deflection over time.

Before storing your planters for winter, empty the soil into a garden bed or storage bin. Clean the planters with a mild soap solution, let them dry completely, and store them in a garage, shed, or basement where they will not be exposed to freeze-thaw cycles. If you have built-in planters that cannot be moved, line them with rigid foam insulation and ensure their drainage holes are completely clear so no water can pool and freeze inside the structure.

Once the planters are removed, sweep the deck surface underneath where they sat and inspect for any soft spots, discolouration, or early signs of mould. Treating those areas with an oxygen-based cleaner before the first hard freeze lets your deck go into winter in the best possible condition. When you place the planters back in spring, consider using pot feet or risers to elevate them about half an inch off the deck surface, which allows air circulation underneath and prevents the same moisture-trapping problem during the rainy months of May and June.

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