See above pictures of a mum harvesting machine that I designed and built. The general principle is the whole unit is pushed along by a front end loader, as seen in the first photo, and conveyor belts are laid along the length of the unit. Workers follow the unit through the field, placing the harvested mums on the conveyor, which are all directed towards the middle and then unloaded onto a cart to be taken to shipping. The whole unit is designed to be folded up and loaded onto a trailer easily for transport / storage , as seen below.
See below images of myself working on a project with an associate on which we installed over ten miles of pipe overhead which was to be used as a rail system for a large basket off of which workers collect flowers below which would cover the entirety of the floor in the greenhouse.
Images below depict myself fabricating shipping crates used to ship flowers after harvest.