It would be great if the chunk loading feature flowerPotChunkLoading would be redstone sensitive.

The reason would be that a remote farm can toggle itself off once it produced enough. Of course vanilla chunk loaders could be used here as well, but those still have the problem that it's difficult to make them survive server restarts.

I think you can use it together with dispensersPotPlants to place or remove the flower (I think they're compatible with each other).

I just tested dispensersPotPlants - It seems it only plants the flower into the pod, but activating an empty dispenser again does not remove the flower though.