Strain dependent I think. I've seen it in some of mine, most recently Lemon Kush.
What scale are you using for ppm? And im guessing your not using bacterial/fungal inoculation? You could cut your nutrient use in half if ya built a microbe ecosystem in your root masswhat ever it is.. fucking rocks.. 1700ppm shes about 4 feet tall.. ohh and an atuo in a 5 gal dwc..mutant..like the hulk
i have all kinda of bacteria and fungi in her.. and yeah 1700ppm..i normally never go over 1400 and that huge outdoor grows...i did stick to the 800 to 900 rule and i just kept pushing it up a little bit at a time to see if she would suffer nute burn.. and well no.. also ITS AN AUTO FLOWER!@.
Nice brotha! Coulda fooled me! Setup looks legit and plant is lookin robust!5 gal dwc. 70W airpump dual outlets both outlets going to bucket.. hydroguard gratwhite shark zho and earthworm tea...my nutes well mostly GH and some botanicare stuff also..
lights 2 cxa 3070's at 2.5 amps each. and 4 26 wat par 38 LED's as side lights
this is my first attempt at DWC and also my first indoor grow