No this wont work.

MJ doesn't just drink water like you and I.

It is the roots that take the water AND nutrient and convert them into completely soluable solutions.

Once the conversion takes place, the roots then assist in converting the solution to sugars and different saccharides.

The solution is then transported up the stems to the leaves and flowers.

The part you are missing here is the roots are needed for the conversion process. Cellulose cannot make the transformation itself. Other cells in the MJ plant CAN benefit from foiliar feeding and watering...but not the cells that sustain the plant as a whole.

I take it you are asking "Can I delay the inevitable decline of a root bound plant by providing life support to the foilage?"

Man thats a tuffy. I dont know the answer to that one.

My guess would be no...or at least, I would prefer the transplant over the foilage supplementation.

If given a choice, I would place my bet on the transplant....

But please, feel free to try it and let us see what happens.

Just dont clog the stomata with all the ferts.

Good luck .