Create stunning, architectural garden beds with the timeless beauty of weathering steel and crisp, straight lines that never bow. Our 15.75" Zero Flex modular raised garden bed system features premium CorTen steel that develops a rich, rust-colored patina over time, delivering superior strength for a wide variety of vegetables and landscape features.
Why Choose 15.75" Zero Flex Weathering Steel?
Versatile Growing Depth: 15.75" height accommodates most vegetables, perennials, and root crops
Living Finish: CorTen steel develops a beautiful rust patina that protects against corrosion while adding organic warmth to your landscape
Superior Rigidity: Thicker 8mm top lip maintains perfectly straight lines—our sturdiest edging option
Modular Flexibility: Mix and match panel sizes to create custom configurations—add extensions anytime
Professional Quality: 2mm thick weathering steel panels by Straightcurve, trusted by landscape architects worldwide
Note: CorTen panels arrive in their natural pre-weathered state and will develop their signature rust patina once exposed to the elements.
What's Included — Panel Dimensions
Each size option ships as a box containing 2 separate panels of that length. For example, selecting "Box of 2 Panels (71" each)" means you receive one box with two individual 71" panels inside.
Large Panels:
Box of 2 × 71" panels
Medium Panels:
Box of 2 × 39.37" panels
Small Panels:
Box of 2 × 31.5" panels
Filler Pack:
Box of 2 × 15.75" panels
Box of 2 × 8" panels
Box of 2 × 4" panels
Specifications: 2mm thick steel, 8mm top edge. Corners measure 4" on each side of the 90° bend.
Choose Your Bracing System
Select the bracing method that works best for your installation:
1. Cross Bracing Straps (for parallel panels up to 75" wide) 40" adjustable straps break off in 2" increments. Combine two straps for wider planters.
Large Panels (71"): 2 straps needed
Medium Panels (31.5" and 39.37"): 1 strap needed
2. Universal Bracing System (tie-back with turnbuckle) Adjustable chain and turnbuckle create constant tension when backfilled, preventing bowing.
Large Panels (71"): 4 units needed
Medium Panels (31.5" and 39.37"): 2 units needed
3. Large Anchor Posts (43" galvanized posts) Pound into ground and secure with self-tapping screws (included).
Large Panels (71"): 4 posts needed
Medium Panels (31.5"): 2 posts needed
Create Custom Curves with Feature Pieces
Add architectural interest with curved bump-outs using 4" feature pieces:
Straight Insert: 4" filler section for custom spacing
Internal Insert: 4" section with 15° angle for inward curves
External Insert: 4" section with 15° angle for outward curves
Q: How long does the rust patina take to develop? A: Typically 3-6 months depending on your climate and weather exposure. Wet climates rust faster than dry climates.
Q: What's the soil capacity? A: Varies by configuration. A 4'×8'×15.75" bed holds approximately 32 cubic feet of soil (about 1.2 cubic yards).
Q: Can I stack these to create taller beds? A: No, the support system and panels are meant to support 15.75" height in level backfill.
Q: Which height should I choose? A: 15.75" works for most vegetables and perennials. For shallower beds, see our 9.5" Zero Flex. For deep-rooted crops, see our 22" Zero Flex.
Need Help Planning Your Project?
We know all these choices can be overwhelming! Our team is here to help you design the perfect configuration and ensure you have all the parts you need.
These baskets are high quality and perfect for a Main Street setting. Henderson Garden Supply was great to work with and helped me choose an option that would fit our budget and timeline.
The column kit with basket is easy to assemble and is very sturdy. I set it up in minutes but planting takes a little time. Plants with a hearty root system work best. I’m happy with the purchase and I’m now just waiting to see it mature.
I purchased the base unit & basket and I’m impressed by the quality. The steel base unit is heavy/sturdy enough to handle our prairie winds. The basket (also heavy steel) sits snugly on top and is able to carry the weight. Planting the sides is a bit challenging when the plants don’t have a lot of roots but if you take your time it works.
We needed a beautiful,
Statement garden ornament for my daughter’s backyard wedding. The garden arch looked great online so we took a chance. The quality is outstanding and it was super easy to assemble. We will definitely buy again from Henderson Garden Supply.
