A The bottom of the product should be made of ceramsite, with geotextile placed underneath and then covered with nutrient soil. Ensure smooth drainage as expected; otherwise, it may cause root rot in plants and deformation of planter. At the same time, ensure that there is no sand or mud in the drainage. The ceramsite should have a 30% to 40% cushion layer, with a thickness of about 12 to 20cm.
