I don't own a field in which Agaves have a free root-run and have pups emerging straight-up at a distance.
Much like the case of the plant in this video https://youtu.be/_ERrIfqyEVo most pups never emerge as the runner attempts to pup far from the mother plant. The potbound runner then goes around in circles. The pups which never emerged are not mature and the change when separated and repotted is too drastic. Last time I was lucky. I have found at a nursery a fully-fledged pup which emerged through the drainage hole. I did not hesitate and bought the plant.
Since I don't own a field, which is the best way to encourage the pups in a container to emerge before the plant becomes rootbound? Would a wide yet shallow container give me the answer?