Crescent Garden Indoor/Outdoor Self-Watering Container, Alpine White, 16 in. Patent pending True Drop system allows planters to go without watering for 2-6 weeks depending on the type of plant and hardiness zone Double-wall construction of planter holds a large amount of water to keep plants thriving longer. Co-designed by Professional Greenhouse Growers, it is 100% recyclable Water level indicator communicates four levels of hydration so you know exactly when your plants need more water. The waterproof plug on the bottom is removable depending on indoor or outdoor use Fertilizers stay in the reservoir, allowing them to be used to full potential for healthier plants. Easy-to-fill hole on top of container includes a secure cap to keep water clean Perfect for first-time gardeners, travellers, and drought conditions, and great for curb appeal and businesses. Enjoy a 10-year warranty when container is drained in the winter