A novel device, system and method for promoting the growth, development and harvest of desired plants while suppressing the growth of weeds. In an exemplary embodiment, the device is a tapered container with an opening at the upper, wider end of the device and an opening at the lower, narrower end of the device. The device also has one or more openings along the surface of the device between the upper end and the lower end. In an exemplary embodiment of the method, a bag of growing medium is placed over the ground and a device is inserted into the bag so that the lower end penetrates both sides of the bag and enters the ground below and the opening at the lower end communicates with the ground. The opening at the upper end of the device should be at or above the upper surface of the bag and at least one or more openings in on the surface of the device should be in communication with the growing medium contained within the bag. Thus, weed growth is suppressed and a plant grown in the device has access to nutrients contained in the bag and the ground below.
