
-- burn on tips and margins, new growth hammered worst,... this girl got nute burned, probably a cumulative thing... This can damage roots, lock out other nutes, cause pH to go way off..
next round I'd suggest changing soils too,

OF is the [HASHTAG]#1[/HASHTAG] problem soil I see in here,...
.... different strains, even phenotypes can have different tolerances and demands, so that's part of why not all of them reacted like this.
.... flushing was the right thing to do-

How much did you put through, and what's the pot size? did you check the pH of the run-off, particularly at the end? ...your tap water, how hard is it, and it's pH? Do you have a TDS meter? If it's loaded with minerals, this is also something that can become problematic after a while,...
.... go easy on the nutes for now,.. roots are surely damaged, they need time to heal up and regenerate... a root tonic is great for helping this-

Look into getting a soil pH probe, something to test in-pot pH; run-off is lousy for that, not a good measuring method! ... the Accurate 8 (Control Wizard) is a good unit, or the equivalent thing under a different brand name...