Landscape timber border plan

Ground contact rating is not optional for a buried border

A landscape timber sits in direct, sustained contact with damp soil, an environment that breaks down untreated or interior-rated lumber far faster than typical above-ground exterior use. Confirm your chosen timber is specifically rated for ground contact, not just general exterior use, before purchasing based on this plan's quantity, since the two ratings are not interchangeable.

Corner count depends on your bed's actual shape

A simple rectangular bed has four corners, but an L-shaped, curved, or multi-sided bed has a different corner count, and each corner typically needs its own stakes to hold the timber ends securely in place. Count your bed's actual corners from its real shape rather than assuming a standard rectangular count, since an undercounted corner is a common way a stake purchase comes up short.

Corner joinery method affects both waste and appearance

Timbers can meet at a corner with simple overlapping ends or with mitered cuts for a cleaner look, and mitered corners typically use more waste per corner than an overlap joint does. Increase your waste allowance if you are planning mitered corners, since the default waste allowance here assumes a simpler overlap-style joint.

Fastening timbers together adds a separate hardware cost

Beyond the corner stakes this plan counts, many timber border designs also use landscape spikes or screws to fasten timbers to each other at overlapping joints and where courses stack on top of one another. Budget that fastening hardware separately from the stake count here, since stakes and inter-timber fasteners serve different structural roles in the border.

Stacked-course borders multiply the timber quantity directly

A border built from a single course of timber uses the quantity this plan calculates directly, but a taller border stacked two or three courses high needs that same perimeter quantity multiplied by the number of courses. Multiply this plan's timber count by your planned course height before finalizing a purchase for a stacked design, since entering the perimeter once only accounts for a single course.

Soil contact behind the timber affects long-term straightness

Backfilled soil pressing against a timber border from the bed side can gradually push an inadequately staked timber out of alignment over time, particularly after heavy rain saturates the soil. Stake generously along longer straight runs, not just at corners, if your bed will be backfilled with a substantial depth of soil or mulch against the border.

Verify before you buy

• Confirm your timber is rated for ground contact, since untreated or interior-rated lumber will rot quickly buried against soil.
• Check whether your layout's corners are cut miters or simple overlapping ends, which changes how much waste each corner actually produces.
• Verify stake length is adequate for your soil type, since a shorter stake can work loose in soft or sandy soil over time.