For use indoors or out, this hollow terra cotta spike is ideal for plants that need a consistent water supply. Simply fill a bottle with water, set the spike in the soil next to your plant, and insert the bottle into the spike. Water seeps steadily through the semi-porous ceramic, slowly wicking into the soil below the surface. At a glance, a low water level in the bottle tells you it's time for a refill.
The 6 3/4" long spike can hold a wine bottle or any other long-necked glass bottle with a neck diameter up to 1 1/4"; it empties a 750ml bottle in a few days, useful for large containers and plants that require a lot of water.
An efficient, convenient watering system, also excellent for keeping transplants healthy until their roots are established.