The coco disc is a really good idea, but they must fit perfectly around the plant and in the pot. Weeds will grow around the edges and still some of them grow through the disc. It slows the growth down, but does not stop them.
These disks work great. Rather than weeding a crop 2-3 times it just takes once to put the fibers on. The slit allows for off center or multi stem plants in pots. They also don't blow off in the wind and allow air and water through better than the synthetic discs.
This product significantly cuts down on the amount of weeds sprouting in pots.
the coco disks worked wonderfully to control weeds in new tree planting at our church. They worked so well at supressing the lawn grasses that [we] plan to use them next year for all my container plants at the farm.