The largest planter offered by Planter Box Factory is generally the 8-foot by 4-foot by 2-foot raised planter box. Its nominal soil capacity is approximately 64 cubic feet. That figure comes from multiplying the planter’s dimensions: 8 ft × 4 ft × 2 ft = 64 ft³. In cubic yards, that is about 2.37 cubic yards.

If you are buying bagged soil, 64 cubic feet equals roughly 32 bags at 2 cubic feet each, 43 bags at 1.5 cubic feet each, or 64 bags at 1 cubic foot each. However, the actual amount needed may be slightly lower. Lumber thickness, drainage material, and leaving a 1- to 2-inch gap below the rim can reduce the usable volume to around 58 to 62 cubic feet.

For best results, line the planter if needed, add a drainage layer when appropriate, and fill it with a quality raised-bed soil mix. The 64-cubic-foot capacity makes this large planter suitable for tomatoes, peppers, squash, herbs, and compact fruit bushes. Always confirm the exact model specifications from Planter Box Factory before ordering soil, because dimensions and capacities can vary by model or custom build.