Update: 4/18/24, Day 32.
All three plants are looking good, although Blanca (the one I dropped as a seedling, and has CalMag deficiency, in back of tent) is still much smaller.
I'm now feeding EC 1300 (Fox Farms Big Bloom and Grow Big, plus CalMag, pH ~6.2), thinking of going up a bit in strength, maybe to EC1500 (note this is uS/cm, equal to 1.5 mS/cm).
I've been doing LST on Tanya (front left), pulling down a stem now and then, but leaving Betty (front right) alone - you can see she's now a bit taller. No sign of flowering yet.
These plants are quite dense - I wonder if that is a good thing? I've been keeping the light at 80%, 20/4 schedule, about 18" above the canopy (AC Infinity IonBoard S33 LED light, 240W). I've also been doing a very light pruning, a leaf or two every day or two.
​