Significant metals lockout, possibly zinc most severe, plus magnesium.
Too dry air and/or too close lights.
Significantly rootbound.
Plants too deep in pots.

Flsuh to bring your soil to pH 6.7, using PLANT pH up/down. Use 3x the volume of the pots. Then feed with a complete fert with micronutes at pH 6.7.

Then wait until the soil dries out and re-pot to a pot that is one gallon for every foot of main stem. Soil level should be within an inch of the top of the pot so as not to restirct air flow across the soil surface.