The Workbench: Make a raised planter box

If you're looking for a way to conserve water, combat gophers and save your knees, a raised planter box may just be your next summer project. You can make one out of redwood lumber, reclaimed wood or even a galvanized steel water tank if you're short on time and tools.

Jose Hernandez, general manager for Sonoma-based Waldron Landscape, has built plenty of traditional raised beds over the years but suggests the latter as a quick, simple solution.

Start with a 1- or 2-foot-tall galvanized steel water tank, available at farm supply stores such as Western Farm Center in Santa Rosa. Drill a series of drain holes in the underside, add a base of rock and fill with organic bedding soil.

If you plan to set it set on a hard surface, place a clay tile or cobblestone at each corner to allow for air circulation and free drainage. Drip lines can also be installed discretely through one of the bottom drain-holes to eliminate the visual distraction of lines draping over the top.

For a finishing touch, some people like to paint their tanks, but be sure to use a galvanized metal primer for proper bonding.

<b>Redwood planter</b>

If you prefer a larger planting area or want to link several beds together, consider building a traditional raised redwood bed. Be sure to select all-heart redwood as the wood's tannin (responsible for creating the red hue) provides rot resistance and mitigates invasive termite infestation.

The size and shape of your planter box is generally dictated by the layout and available yard space. Some people prefer a series of square boxes accented around the yard, while others enjoy the efficiency of larger, 6-foot long by 2-foot-wide beds.

One-foot tall planters will suffice for herbs and some shallow root veggies, but most plants will require a soil depth of two feet in order to maximize their growth.

You will need the following materials for the larger bed:

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