The Lechuza plant container includes an internal irrigation system and gauge. Reducing watering to every 3-4 weeks in Summer and every 6-8 weeks in Winter. Three sizes available Size 1. 30cm - 30x30x56  = €139.00 Size 2. 40cm - 40x40x75  = €219.00 Size 3. 50cm - 50x50x95 = €359.00 How the watering system works:  1. Water level indicator No waterlogging, no dry spells: The water level indicator instantly shows you when your plants need water. 2. Water supply shaft Makes adding water and fertilizer easy. 3. LECHUZA-PON Acts as a drainage layer and controls the water supply. In addition, PON is a natural storage layer for water, nutrients and fertilizer. 4. Separator Forms the water reservoir in the bottom of the planter. 5. Drain plugs removed to allow rainwater to drain when used outdoors. It can simply be re-inserted for use indoors.