This invention provides a truncated, ground-embeddable conical irrigation ring having an integral weed-abatement collar. The slight conical nature of the ring allows for nested stacking of the devices. A first embodiment device has an annular collar with a circular outer perimeter. The weed-abatement collar is wide enough to prevent most weeds from beginning growth outside the ring, creeping over the edge thereof, and into the plant growing region within the ring. The ring prevents water that is provided to a plant growing within the ring from seeping outwardly into soil were no plant growth is wanted. A second embodiment has a hexagonally-shaped weed-abatement collar that allows for honeycomb arrangements of multiple devices which completely cover the ground between irrigation rings. A third embodiment also has a hexagonally-shaped weed-abatement collar. Half of the collar perimeter is equipped with a light-blocking underlapping shelf.
