What's the best way to winterize outdoor benches and a planter box in a cold climate?

I’ve been through enough brutal winters to know that outdoor furniture isn’t just “outdoor” — it’s a living part of your garden that needs a warm coat and a good night’s sleep. My wooden bench? It’s my morning coffee companion. My planter box? It’s the home for my perennials. If I abandon them to snow and ice, they’ll crack, warp, and rot by spring. So here’s what I’ve learned, the hard way, about winterizing them right.

For the Bench (It Deserves a Spa Day)

First, I give my bench a thorough clean — a stiff brush and mild soap to remove dirt and mildew. Then, I let it dry completely. Water trapped in wood grain is the enemy. Next, I apply a high-quality wood sealant or outdoor furniture oil, especially on the legs and joints where moisture settles. For metal benches (mine has a few steel brackets), I wipe them down with a rust-inhibitor spray. Finally, I cover the bench with a waterproof, breathable furniture cover — not plastic bags, because they trap condensation and create mold. If you don’t have a cover, an old tarp with wooden slats to keep airflow underneath works fine. I also store cushions inside, always.

For the Planter Box (It’s a Root Mansion)

My planter box is made of cedar, so it’s naturally rot-resistant, but that doesn’t mean it’s immune. I empty the soil completely — wet soil freezes and expands, cracking the walls. If I have tender perennials, I transplant them into pots and bring them into an unheated garage. For the empty planter, I clean the interior with a mild bleach solution (to kill any fungal spores), then let it dry. I seal the wood inside and out with a clear, non-toxic waterproofing formula. Then I raise it off the ground with small blocks or feet, so melting snow doesn’t pool underneath. To protect the planter’s exterior from snow and salt, I wrap it in burlap or a frost blanket — this gives it an extra insulating layer while letting it breathe. My final trick: I stuff the planter with dry leaves or straw to reduce freeze-thaw cycles on the walls, but only if it’s too late to move inside.

The Golden Rule: Dry, Seal, Breathe

Every winter failure I’ve seen comes from moisture and sudden temperature swings. So I never spray water around my furniture in late fall, and I make sure air can circulate under every cover. For my planter’s base, I drill a few small drainage holes before winter — puddles inside the box are fatal. And I keep a simple frost alarm (a cheap indoor/outdoor thermometer) near my garden, so I know when to add extra insulation.

After doing this for three winters, my bench still greets me with dry wood and my planter box holds strong every spring. It’s not just work — it’s a handshake with your garden, promising to meet again when the snow melts.