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How to Build a Cedar Planter Box for Large Trees
How to Build a Cedar Planter Box for Large Trees. Landscaping around large trees is easy when building a simple planter box. Planter boxes help avoid soil erosion and water runoff. When placed around large trees, these planter boxes provide a pleasing landscape feature, and an optional flower bed can be placed inside the box. Cedar is a soft but...
Landscaping around large trees is easy when building a simple planter box. Planter boxes help avoid soil erosion and water runoff. When placed around large trees, these planter boxes provide a pleasing landscape feature, and an optional flower bed can be placed inside the box. Cedar is a soft but hearty wood to work with and has a specific oil and odor that keeps pests at bay.
Things You'll Need
8 4x4 cedar posts
Nails (6 to 8 inches long)
Hammer
Maul
16 pieces of 2 foot long steel re-bar
Frame the perimeter of the tree using eight 4x4 posts. The posts should be of equal length and long enough to frame the root system at the base of the tree. Eight to 10 foot long posts suit most large trees, however you can use longer or shorter posts if you desire.
Dig a 2 inch deep by 4 inch wide trench in a square pattern around the tree where you wish to place the posts. Fit the posts together in a square pattern around the tree and place them into the trench. Ensure the posts are flush against one another at the ends. Nail the ends together.
Drill four holes through each post using a half inch spade bit. Space the holes evenly on every post. Mark your drill holes on the side of the post with a pencil.
Stack the remaining four posts on top of the square frame and ensure that the ends are flush with one another. Nail the ends together. Drill through the top posts and make sure they line up with the drill holes on the bottom posts.
Place steel re-bar into the holes and hammer down with a maul. This will keep the posts from falling over or shifting over time.
Fill the interior of the planter box with your favorite mulch, compost, topsoil or soil amendments and water thoroughly.
