After doing part of the room to the right, I reset A2, pushed the plant up to the top door, then came around through the bottom and to the right and pushed the plant down from the top door. I couldn’t figure out how to do the room to the right (I’m not looking at the map to tell whether it’s labeled B2 or A3) so I thought solving this room a different way might be involved. Although now I suspect that isn’t the case.