To maintain a cedar planter boxes, consider these options:

You can choose to leave them untreated, opt for a clear water-proofer, use a non-toxic stain, or apply a wood treatment like linseed or tung oil, and ensure proper drainage for winter protection.

Here’s a more detailed breakdown:

1. Natural Cedar Protection:

Cedar is naturally rot-resistant and insect-repellent due to the oils it contains, so you can choose to leave it untreated.

Waterproofing: For added protection against moisture, consider applying a clear, non-toxic water-proofer like Penetrating Water Proofer Infused With Juniper.

Staining: If you prefer a different color, opt for a non-toxic stain like PolyWhey Exterior Penetrating Wood Stain.

2. Wood Treatments:

Linseed Oil: A natural oil that can help preserve cedar and is ideal for organic edible garden beds.

Tung Oil: Another natural oil that can be used to treat cedar wood planters.

Spar Urethane: For non-edible planters, a water-based spar urethane varnish can provide protection from water and sunlight.

3. Drainage and Liner:

Drainage Holes: Ensure your planter has adequate drainage holes to prevent water buildup and rot.

Lining: Consider lining the planter with a plastic liner to create a barrier between the wood and the soil, especially if you plan to grow edibles.

Ventilation: If using a liner, ensure it has adequate drainage holes.

4. Winter Protection: If possible, store your cedar planter boxes in a garage, shed, or under a porch during the winter months. If storage isn’t an option, cover the planters with a water-repellent tarp, but ensure proper ventilation to prevent moisture buildup.