How to Add a Built-In Planter to Your Deck

If your deck is ≤2–3 ft off the ground, you can plant a tree/shrub directly in the soil through a framed opening in the decking. Design framing so a joist runs along each side of the opening; close with two cross-braces cut from a joist. Then install decking.

For higher decks, build a raised planter box. Use ground-contact rated preservative-treated wood. Frame with 2×10 joists (even if other joists are smaller). Cut 3/4″ plywood to frame size, drill several 1/2″ drain holes. Screw plywood from below to form bottom. Line with landscape plastic, poke holes aligned with drains, fill with soil.

Small Trees for Decks and Patios | Guide to Container Gardens