At our planter box factory, we stand behind the structural integrity of our products. Regarding the specific question: What’s the warranty period for the planters against warping? The answer depends on the material. For our standard fiberstone and fiberglass planters, we offer a 5-year limited warranty against warping, cracking, and structural deformation under normal outdoor use. This warranty explicitly covers warping caused by manufacturing defects or material inconsistencies. For our premium wood alternative composite planters (made from HDPE and recycled materials), the warranty against warping is extended to 10 years because these materials are engineered to resist thermal expansion and moisture absorption. Please note: our warranty does not cover warping caused by physical abuse, chemical damage, or extreme environmental abuse (e.g., direct flame or heavy impact). Traditional cedar or metal planters typically come with only a 1 to 2-year warranty, as they are more prone to warping due to weather cycles. We recommend checking the specific care guide included with your order, as proper drainage and weight distribution directly affect long-term shape retention. Our factory also provides a free replacement for any planter that visibly warps beyond 1/4 inch within the warranty period, given the damage is verified as a defect.