Roman™ Self-watering Plantpots are designed with a classic style. With regular, good-quality potting mix, plants can thrive by taking just the amount of water they need from the waterwell®. The ventilated floor helps aerate their root systems. When used outdoors, rainwater can collect in the waterwell® for later use.Depending on the size and type of plant and environmental conditions, some species can thrive for up to four weeks between watering. Others may require more frequent attention for best results.