There is all sorts of Finishing Boosters and enhancers on the market.. These boosters do work but leave a residue in your finished product. Here at TheGrow Pro we like clean Medical Cannabis. The optimum way to get fresh clean cannabis is to flush with good oxygenated ph water. This is the best finishing booster you can give your maturing plant! Look for the signs when you plant is going to start fattening up, and feed her fresh clean water and she will give you fresh clean flowers!