there is no rule .. if you're in soil try to five pure water 10 days minimum .. in hydro it can go faster
dont try to make them yellow or starve them
koolbloom, for me looks like a booster for soil, there is much P .. dont overuse it man
for the last 2 weeks in conjonction with a reduction of the main nutrient .. use a little bit, or it will accumulate in the soil/burn the plant and even 3 week flushing wont allow the plant to consume it ..
Don't flush just stop giving nitrogenSo dont use the koolboom dry
Do it workI wasted money on Koolbloom whatever is left is sitting on a shelf. If you try it , try it on half of your plants to see if it is worth it for you.
The only thing I noticed was runny stretchy foxtailing budsDo it work
Pre harvest Flushing is absolutely a myth. I grow water to waste hydro and stopped flushing before harvest 2 years ago.Feeding once the plant has gone into senescence (using up stored nutes) has been proven to be a waste of nutes and $$.
https://atrium.lib.uoguelph.ca/xmlui/bitstream/handle/10214/12125/Stemeroff_Jonathan_201712_Msc_with_erratum.pdf?sequence=8&isAllowed=y