have you been hand watering do this until the roots it the water :karma Cloud:
yes dwc dose take a bit longer to take off but you will get there
I've only used rockwool once, but they do see a bit high up in the pot, and a bit dry'ish... ? Hand water with strong root stim formula and very low EC until roots hit the water, 3 or 4x times a day. pH 5.5-5.7.
They dont look bad at all for 13 days stunted! It would be alot worse if they were all yellow etc. My babies were like that for a few days, I though nothing was going on, but all of a sudden roots started peeking out all over. They're surely making their way through the pebbles... they look healthy! Let 'em rip!