3 out of 4 at least are looking prime! ....IMO the NDF is just a problem pheno' in a line that apparently is a bit notorious. That problem child of mine I mentioned earlier also grew well enough in size, however counterintuitively!
The only other thing I can think of is the soil/pot has gone sideways somehow, some way... If you've feed plenty and all you get is tip burn, then that's a sign the problem isn't a nutrient-lack-of issue. Either there's some pH and/or an antagonistic uptake snafu going down, and/or this pheno is a nute bitch.
Which Bush Dr. product are you using?
I'm debating if a full on flush might be in order... I wish we had an in-pot pH reading, and some run-off ppm info. I forget, are you using mineral nutes or organic?
Is she drinking well? Does this soil drain well, or is it pretty water retentive?
...hitch is, a flush is a sort of trauma itself... Done fast, and speeding draining along by using some wicking action from the bottom can really help reduce that water logged saturation time.
If I have to flush, I use low ppm water + wetting agent, start with about the same volume water as the pot has, and take some EC/TDS readings along the way; test that first qt of run-off, middle way and at the last pour...
Sometimes, depending on how high or low the last pour reading is, I may put a weak nute soln. though at the very end to restore some of what's been stripped. The idea is to "reset" the pH and nute balance and conc. in there...
...tilt to help drain for several minutes, then place pot on a stack of newspaper with a layer of paper towels on top (great wicking contact) to help draw off excess water.
Anyway, food for thought!
