At our planter box factory, the most popular size for front porch entryways is 36 inches long, 12 inches wide, and 12 inches high, or about 91 x 30 x 30 cm. This rectangular planter has become the go-to choice because it fits comfortably beside most front doors without crowding walkways. It is large enough to make a welcoming visual statement and hold a mix of seasonal flowers, ornamental grasses, or a small evergreen, yet compact enough to move, plant, and maintain easily.

The 36-inch length gives a porch a balanced look when planters are placed in pairs. The 12-inch width offers enough soil volume for healthy roots while still leaving room for guests to pass. The 12-inch height creates a strong presence at the entryway, but it remains low enough for easy watering and pruning. For many homeowners, this size also works well with standard steps, railings, and door widths.

We do see demand for slightly taller and deeper versions for larger shrubs, but the 36 x 12 x 12 inch box remains the most requested entryway planter. It is available in wood, composite, and metal-look finishes, with drainage options and custom colors. If a porch has limited space, a 30-inch length can work well; for wider entries, a 48-inch box may be better. Still, for the average front porch, the 36 x 12 x 12 inch planter box offers the best balance of proportion, portability, and planting capacity.