Kapancuervo yes you may be maxing out, 17ppm should still be fine for purposes of sex reversal - start spraying
I looked at the makeup of STS and noticed it had to things in it that were also in match heads.
I spray the entire plant. It does not hermi, that's different, the entire plant changes sex.
To get the pollen out I cut the she/male heads off when I reckon they're ready and put them through a grinder.
THEN BRUSH THIS STUFF ON TO ITS MUM...SO THE DAUGHTER FUCKS ITS MUM
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THE END RESULT IS FEMINISED SEED...THESE WERE ALL VIABLE AND I HAVE MANY MORE
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They can only be female...there are no xy chromosomes in the mix.
They will be and are identical to the original mother...guaranteed.