good ol' soilWhat medium are you using ?
thanks for admitting to the chemical tastes resulting from feeding ferts to the end.I use the 3-12-6 flowering nute from Dyna-Gro. It is a liquid that completely mixes with the daily watering. I quit using the flowering nutes when I have 10-14 days left to flower. Seems to cut down on any chemical after-taste.
Good luck, BigSteve.