Creative idea, but photosynthesis requires water.
Here's a brain fart for ya... switch from soil to hydro when you chop. Plants would have to be trimmed like a lollypop. Immediately after chopping, put the main stem in a 5 gallon bucket of water with a hole cut in the lid. Maybe add a little potassium sulfate to the water for a citrus profile. Then just keep going with the same light cycle until the desired fade is achieved.
Basically the bucket is like a giant vase, and your pot plant is a giant flower. Give it a fresh cut & stick it in the vase.
Wadaya think?
I'm baked like a potato.