Growing fresh herbs indoors can be a tricky task, but an outdoor garden bed requires yard space that not all of us have. So what’s an herb lover to do? If you’ve got a free afternoon and basic carpentry skills, This Old House general contractor, Tom Silva, has the perfect solution: Build an all-weather raised planter that can live on your porch or patio.
- Shown: Colonial pressure-treated pine deck post; available at home centers.
- Stain: Olympic’s Semi-Transparent MAXIMUM Stain & Sealant in One in Canyon Sunset. Available at The Home Depot.
Steps for Building a Raised Herb Garden Planter
This compact piece takes up less than 6 square feet and has a few handy hooks to hold your gardening tools. Best of all, it will let you enjoy fresh herbs all season long without back-breaking labor.
Step 1: Herb-Garden Planter Overview
Herbs should be grown in soil that’s at least 4 to 5 inches deep, says the National Gardening Association. We built our planter from pressure-treated lumber: four deck posts and some 1x6s and 2×2 balusters.
Tom cut the parts on a miter saw, but you can use a portable circular saw or even a handsaw instead. The bottom of the planter consists of a couple of floorboards to support a sturdy liner that holds the soil. We used a plastic utility tub for this purpose and simply sized the planter to enclose it.
Herb-Garden Planter Cut List
- 3¼-inch-square corner posts: 4 @ 36 inches
- 1×6 for short sides: 4 @ 22½ inches
- 1×6 for long sides: 4 @ 34 inches
- 1×6 floorboards: 2 cut to fit (Ours were 25 inches.)
- 2×2 cleats for long sides: 2 @ 31¼ inches
- 2×2 for long sides: 4 @ 7¼ inches
- 2×2 for short sides and corner blocks: 10 @ 8½ inches
Step 2: Cut the Legs to Length
Trim sections off both ends of a deck post to the planter’s height, leaving one end’s square section long enough to attach the planter’s sides. We made our first cut so that the longer square section measured 14½ inches, then marked 36 inches from that cut end and made the second cut. Use the first leg to mark and cut the others as shown.
Step 3: Attach the Cleats
Cut the 1x6s and 2×2 balusters for the planter’s sides and cleats. (Use our cut list.) Screw a 2×2 cleat to the inside surface of two of the longer 1x6s. Position each cleat ½ inch from the board’s bottom edge and center it lengthwise. Drill 3/32-inch pilot holes through the cleats, then secure them with 2-inch deck screws.
Build the Sides
The planter’s sides are made from two 16 boards butted edge to edge. Hold them together by fastening 2x2s across the joints with 2-inch deck screws as shown. For each short side, fasten a 2×2 in the center and 2 inches below the top edge to leave room for the liner’s lip. For each long side, use two evenly spaced 2x2s placed against the bottom board’s cleat.
Step 5: Screw on the Corner Blocks
Fasten a 2×2 corner block to each end of all four sides of the planter using 2-inch deck screws. Position the blocks ⅛ inch in from the ends and ½ inch up from the bottom edges of the sides. These eight corner blocks provide a solid surface for attaching the legs to the planter and also help hold the sides together.
Step 6: Assemble the Planter
Drill three evenly spaced 3/32-inch pilot holes through each corner block. Align one side’s corner block with the inside corner of one of the legs. Drive 2½-inch screws through the corner block and into the leg. Repeat for the remaining sides and legs as shown.
Step 7: Install the Floorboards
Cut two 1×6 floorboards to span the width of the planter. Set the floorboards onto the cleats roughly equidistant along the planter’s length. Fasten each end of both floorboards to the cleats with a 2-inch deck screw, drilling pilot holes first to reduce the chance of splitting the boards.
Step 8: Drill Drainage Holes in the Liner
Turn the utility tub upside down, and use a drill/driver to bore six or more evenly spaced ⅜-inch-diameter holes through the bottom. These holes are necessary to allow excess water to drain from the soil.
Step 9: Finish the Planter and Attach the Hooks
Apply deck stain to the planter. Once dry, screw hooks to each end of the planter for hanging gardening tools. Set the utility tub in place, add some clean gravel, and fill the planter with soil and your favorite herbs.
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