Just off a glance you burned them with too much macro nutes hence the burn in between veins.
after reading 250-300 run off is too high for those. Assuming you fed again the ppm in the medium is probably around 500-800 ( hence your burn )
use water for 3 watering a
dial nutes back to1/4...
Now.
Transition and harden off for a spring harvest.
Tales cuts off the bottom of that crop to create your next full term crop.
I like to save the weaklings andturn them into monsters for a full sun garden
Doug