How to Build Cedar Raised Garden Beds | DIY Under $30

Store-bought cedar kits run from $150 to $400, but you can build the same thing for the price of a pizza dinner. The trick is using cedar fence pickets instead of dimensional lumber. The build is straightforward enough for a first-time DIYer — cut the rounded tops off the pickets, halve two of them for the short sides, and screw everything into 11-inch support blocks cut from a 2×4.

What You Need for a $28 Cedar Raised Bed

You likely already own the tools.

• Cedar fence pickets: 6 pieces, standard 5/8″×5.5″ × 6 ft — roughly $2.50 each at Lowe’s
• 2×4 board: 1 piece, 8 ft long — cedar or untreated pine, about $5
• Exterior wood screws: 1 lb box, 2-inch length (GRK or similar) — $8
• Drill — corded or cordless
• Saw — circular saw or hand saw
• Tape measure, clamps, screwdriver

Optional but smart: a roll of 5/8″ hardware cloth ($12) stapled to the bottom keeps burrowing animals out, and landscape fabric ($8) prevents soil from washing through the gaps.

Step-by-Step Build: Six Cedar Fence Pickets Into a Bed

This method from White & Wood Grain takes about two hours and requires no complex joinery. Work on a flat surface and keep a square handy.

Cut the Dog Ears and Shorten the Pickets

Every fence picket has a pointed “dog-ear” top. Cut about 1 inch off the top of all six pickets to get a flat, even edge. Then take two of the six pickets and cut them in half at the 3-foot mark — you now have four 3-foot boards for the short sides and four untouched 6-foot boards for the long sides.

Cut the 2×4 Into Support Blocks

Cut the 8-foot 2×4 into six pieces, each 11 inches long. These support blocks give the bed its depth and hold the picket layers together. Every joint in the final box gets one of these blocks as its connection point.

Assemble the Long Sides

Lay two 6-foot pickets flat, one above the other with their edges touching. Position three support blocks evenly along the seam — one at the center and one near each end. Screw through the pickets into each block with two 2-inch screws per block. Repeat this for the second long side.

Assemble the Short Sides

Same process: lay two 6-foot pickets flat, attach three support blocks evenly spaced. You now have four wall panels — two long, two short.

Form the Rectangle

Stand a long side panel up on its edge. Hold a 3-foot picket perpendicular at one end so the picket’s face sits flush against the support block. Screw through the picket into the block. Attach the second long side panel to the other end of the same 3-foot picket. Repeat with all four short pickets until the box is complete. The result is a rectangular bed that needs no bottom and sits directly on the ground.

What Size Raised Bed Should You Build?

The dimensions of your bed affect everything from plant spacing to how easy it is to reach the center. The 3′×6′ build above suits most vegetable gardens, but here are the standard sizing rules from the University of Georgia’s field report.

The 11-inch depth from the fence-picket build works for tomatoes, peppers, lettuce, beans, and most herbs. Our tested roundup of the best cedar raised garden bed kits includes deeper options for carrots and potatoes.

Common Mistakes That Ruin a Cedar Raised Bed

A raised bed looks simple, but a few oversights will shorten its life or kill your plants. These are the errors experienced builders see most often.

Skipping the Dog-Ear Cut

Leaving the pointed tops on the pickets creates gaps at the corners and an uneven top edge. The bed won’t sit square, and the gaps let soil spill out. Cutting that 1 inch off each picket is not optional.

Setting the Bed on Concrete or Pavers

A raised bed needs soil contact for drainage and root expansion. Placing it on a hard surface traps water, rots the bottom boards, and prevents deep-rooted plants from ever reaching the ground beneath. Always set the bed on bare soil or loose gravel.

Using Non-Cedar Wood Without a Liner

Pine and fir rot within two seasons when they touch damp soil. If you use anything other than cedar or redwood, Lowe’s guide on building raised beds recommends stapling heavy-duty plastic sheeting to the interior walls to extend the bed’s life by several years.

Forgetting Burrowing Protection

Gophers and voles will tunnel up through the bottom of an unprotected bed within weeks. Staple 5/8-inch hardware cloth across the bottom before adding soil. It’s cheap insurance that costs $12 and saves your entire crop.

How Deep Should a Cedar Raised Bed Be for Vegetables?

Depth determines what you can grow. The 11-inch bed from the fence-picket build works for most common vegetables but has limits.

To go deeper without buying new lumber, simply stack a second layer of pickets on top of the first. Screw additional 11-inch support blocks into the existing ones and attach a second tier of pickets.

Is It Cheaper to Build or Buy a Cedar Raised Bed?

Building is cheaper by a wide margin. A comparable cedar kit from Greenes Fence (model RCEV2448P) runs $197.99 for a 24″×48″ elevated bed — nearly half the growing area for seven times the price. The Jumbl 72″×23″ elevated bed gives you more length but a narrower 23-inch interior. The DIY bed gives you maximum volume for the lowest cost, and you control the dimensions.

Commercial kits have two advantages: they’re pre-cut with no saw work, and elevated designs at 30–31 inches spare your back during planting and weeding. If you want the convenience of a kit, Infinite Cedar sells a 4′×8′×11″ kit for deep-rooted crops, and Eartheasy offers depths from 5.5 inches up to 33 inches.

Finish With the Final Assembly Checklist

Before you fill the bed with soil, run through this list to avoid rework.

• The bed sits on bare soil, not concrete. If the ground is unlevel, scrape it flat or use a layer of driveway gravel to level the base.
• Hardware cloth is stapled securely across the bottom, with edges bent downward so no sharp points face up.
• All screw heads are driven flush. Countersink them slightly so the sharp heads don’t nick your hands during planting.
• The top edges are level within half an inch. An uneven bed leads to dry spots on the high side and water pooling on the low side.
• You called 811 before digging in any area where underground utility lines might exist.

Fill the bed with a mix of 60% topsoil and 40% compost. Water it thoroughly before planting anything — the fresh soil will settle about an inch, so top it off before adding seeds or starts.