im using Supernatural brand Bud Blaster its 1-52-31

Total Nitrogen (N).................1%
1.0% Ammoniacal Nitrogen
Available Phosphate (P205).....52%
Soluble Potash (k20)..............31%

And i have clearex flushing solution.

It says to use when the flowers are in the ripening stage so im guessing thats the final week or so plus my hydro store guy told me to use it in the 2 final wk?