15.75" Fixed Height Modular Weathering Steel Planter

15.75" Height Modular Weathering Steel Planter Panels

The perfect middle ground. Straightcurve's 15.75" weathering steel modular panels deliver the same contractor-grade CorTen quality as our full-height planters, in a versatile mid-height profile ideal for accessible gardens, tiered designs, and low retaining walls.

🛠️ Not sure how many panels you need? Use our free Planter Box Configurator to design your layout and get an exact parts list.

We offer three heights to suit any application:

• 9.5" Height — Low-profile edging and shallow raised beds, ideal for patios and hard surfaces
• 15.75" Height — You are here. Mid-height option, great for accessible gardening and tiered designs
• 22" Height — The most popular height for deep raised garden beds and statement planters

• 2mm thick CorTen (weathering steel) — built to outlast the job site
• Folded lip top edge — no sharp edges, clean professional finish
• 6 panel lengths from 15.75" to 78.75" — mix and match any configuration
• Modular connectors for square, rectangular, L-shaped, and custom layouts
• Arrives in pre-rust black/gray — natural patina develops after installation
• 1.8" top lip thickness for a bold, finished look

• Raised garden beds and planter boxes
• Retaining walls (single wall or closed shape)
• Accessible and low-profile garden beds
• Tiered landscape designs
• Rooftop and hard surface planters
• Outdoor furniture bases and storage boxes

Every planter starts with a plan. Use our Planter Box Configurator to map out your design, choose your panel sizes, and generate a complete parts list — so you order exactly what you need, nothing more.

Closed Corner — For traditional square or rectangular planters. Connects panels at 90° for a clean, enclosed shape.

Open Corner — For L-shaped planters. Allows panels to connect at an outward angle for custom layouts.

Straight Join — Connects two panels end-to-end to extend the width or height of your planter.

Planters with 4 panels or fewer (square/rectangular, no straight joiners) under 47.25" per side do not require bracing.

• Universal Bracing Strap — Use between any 2 parallel straight joiners on planters up to 47.25" wide.
• Rib + Universal Bracing Strap — Required for 78.75" panels. Install 1 rib per panel at center, then connect ribs in an X with the bracing strap.
• Large Anchor Post & Bracket — Best for widths over 47.25" or any panel needing extra support. No ribs required.

Download PDF Installation Instructions

Our team is here to help. Use the Planter Box Configurator for a self-serve parts list, or email us at info@straightcurve.com and we'll make sure you have everything you need.