Molds for DIY cement/gypsum planters: First, align the four parts of the mold base and secure them together with rubber bands—more bands are better. Pour in approximately 100 g ± 10 g of gypsum or cement, then press the central mold into place (make sure to apply a release agent or lubricant to the mold beforehand). Once fully set, carefully remove the central mold, then take off the rubber bands and disassemble the surrounding modular sections.