With just a few square feet of space inside or outdoors and our Self-Watering Casciana Vertical Planter you have almost everything necessary to grow your own vertical fruit, veggie, herb, or flowering garden. Made from a high-quality plastic material, these slate grey planters are resistant to UV rays and nearly shatterproof. Use one planter to create a tabletop centerpiece or stack two or three of these universal planters to construct a vertical garden of up to 4 feet high! Each planter box holds up to 13 plants. The integrated self-watering system will keep your plants moist and nourished for up to 12 weeks. Simply monitor the water-level with the built-in soil moisture meters and enjoy beautiful plants with minimal work. Please note: only the three-planter set includes the round base.