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Tall Patio Planter Box Plans (18″ × 18″ × 24″)

A tall square planter with 4x4 legs, three courses of 2x6 siding and a slatted floor for drainage. Great for herbs, small trees or flanking a front door.

18″ W × 18″ D × 24″ H20 pieces44 screwsGarden
Open & customize in 3D (free)→Sample PDF plan
3D model of the tall patio planter
18″ × 18″ × 24″ tall planter: 4x4 legs with three courses of 2x6 siding and slatted floor.

Cut list

Identical pieces are grouped. Lengths are finished lengths in inches.

QtyMaterialSizeCutsPieces
4×4x424″Square (90°)Corner Posts
6×2x618″Square (90°)Siding Tiers
6×2x615″Square (90°)Siding Tiers
2×2x48″Square (90°)Floor Cleats
2×2x415″Square (90°)Floor Slats

Lumber shopping list

Board counts are optimized from standard stock lengths and include a 1/8″ saw kerf per cut.

Tools you need

Assembly steps

  1. Frame Assembly
    4× Corner Post (4x4, 24″) 6× Siding Tier (2x6, 18″) 6× Siding Tier (2x6, 15″) 2× Floor Cleat (2x4, 8″)
  2. Top & Finishing Assembly
    2× Floor Slat (2x4, 15″)
Want 3D diagrams for every step, board cutting layouts and screw placements? Open this plan in BenchBuild to modify the 3D model, change any dimensions or add pieces, and your cut list updates instantly.

FAQ

How much lumber do I need for this tall patio planter?

2× 4x4 × 8′, 3× 2x6 × 8′, 1× 2x4 × 8′. That is 6 boards in total, optimized from standard stock lengths with a 1/8″ saw kerf.

What screws should I use?

The plan uses 44 wood screws (2-1/2″). Use exterior-rated screws for outdoor builds.

Can I customize or modify this plan?

Yes. Open it in the free BenchBuild 3D studio to freely modify the model, resize parts, add pieces, or change lumber dimensions. Your cut list, board count and cost estimate update automatically.

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