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For a longer modular bed

Birdies Large Modular Raised Bed

A Birdies steel kit with internal bracing, in six layouts up to 5 × 4 ft, 15 or 29 inches tall. Birdies sold it as the Medium bed before renaming its sizes.

12 sizes and layouts

Each size drawn from above at the same scale, with the maker’s listed capacity.

Drawn to scale from the maker’s figures: 72 in by 24 in, 15 in tall.12243615 in72 in × 24 in
Drawn from the maker’s published figures: the footprint from above on the left, the height on the right, in inches. Every bed on this site uses the same two scales.
Inside
Measure after assembly
Planting depth
Choose fill depth
Listed capacity
15 ft³
Outside footprint
Measure after assembly

For a longer modular bed

The 4-foot-wide layouts need access from both long sides. Mark those paths before deciding which layout fits.

Style
Open-bottom bed
Material
24-gauge (0.50 mm) steel coated with zinc, aluminum and magnesium (ZAM 100)
Warranty
Limited lifetime warranty on beds bought direct from Birdies: repair or replacement at no cost for 5 years, then replacement at 50 to 75 percent of the current retail price.
Bottom
Open to the ground

Choose the size or layout

Use the widest outside footprint to plan paths. For a soil order, measure between the inside walls after assembly and choose your filled depth; advertised dimensions can be rounded. Rectangular sizes below read length × width × height.

Scroll across the table to compare all measurements and plan a size.

Size / arrangementAdvertised dimensionsDocumented outside footprintInside dimensionsPlanting depthListed capacityPlan
2 × 6 ft, 15 in tall72 × 24 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth15 ft³Plan this size
2 × 7 ft, 15 in tall84 × 24 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth17.5 ft³Plan this size
3 × 4 ft, 15 in tall48 × 36 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth15 ft³Plan this size
3 × 6 ft, 15 in tall72 × 36 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth22.5 ft³Plan this size
4 × 4 ft, 15 in tall48 × 48 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth20 ft³Plan this size
4 × 5 ft, 15 in tall60 × 48 × 15 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth25 ft³Plan this size
2 × 6 ft, 29 in tall72 × 24 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth29 ft³Plan this size
2 × 8 ft, 29 in tall (as printed)96 × 24 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth33.8 ft³Plan this size
3 × 4 ft, 29 in tall48 × 36 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth28.8 ft³Plan this size
3 × 6 ft, 29 in tall72 × 36 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth43.2 ft³Plan this size
4 × 4 ft, 29 in tall48 × 48 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth38.4 ft³Plan this size
4 × 5 ft, 29 in tall60 × 48 × 29 inMeasure after assemblySize sourceMeasure after assemblyChoose fill depth48 ft³Plan this size

Where the maker’s figures disagree

  • The 29-inch page lists 8 × 2 ft with 33.8 cu ft where the 15-inch page lists 7 × 2 ft; the other five 29-inch figures equal length × width × 2.4 ft, which for 8 × 2 ft would be 38.4.
  • The pages name the coating both Zincalume and ZAM 100.

Measure the inside of the assembled bed before ordering soil.

Prepare and assemble this bed

Compare the material, bottom and care choices if you are still deciding between families. Follow the site preparation and liner checklist for the supporting surface.

  1. Choose the exact configuration and lay out its parts. Check the required tools in the selected kit instructions.
  2. Prepare a stable, level position and confirm the outside footprint with working paths.
  3. Check corners, fasteners, protective edging and any layout-specific braces against the kit instructions before adding fill.
  4. Measure the finished inside and outside separately, then update your plan. Preserve the maker’s fill restrictions.

Mark the outside footprint on the ground before assembly, including any legs or protruding corners. Leave a route for carrying bags, reaching the plants and maintaining nearby beds.

This bed is open to the ground. Check the soil and drainage where it will sit before adding fill. Its wall height is not a prescription for how deep the growing mix should be.

Choose a reachable widthMeasure for a soil order

Product specifications