Building Planter Boxes on a Wood Deck Without Rot

Heavy planters on a wood deck trap moisture and rot boards. The solution: mobile, elevated planters.

Build on Casters

• Construct planter boxes with 4×4 legs and heavy-duty locking casters (outdoor-rated).
• Height: 12–18″ off deck surface.
• Line with landscape fabric, fill with lightweight potting mix (not garden soil).

Maintenance Routine

1. Roll planters 6–12″ monthly to let deck dry underneath.
2. Check casters annually—replace if seized.
3. Empty and store off-deck in winter if possible.

Why This Works

Airflow prevents trapped moisture. Mobility lets you chase sun/shade. No deck penetration = no leaks.

Use rot-resistant lumber (cedar, redwood) or composite for the boxes.