I would've transp'd em earlier to a gal size, looked like you went smaller than red solo to 3-5gal, small roots big pot = less oxygen less frequent waterings slower root growth. Looks like you didn't add perlite, big mistake, roots like airy chunky soil so they can Penetrate deeper, ~30% perlite 60% ffof and tiny bit of gypsum epsom in my mix I'll get dolomite lime (ph +calmag) for the next run.
Also sounds like you cheaped out on the soil, if hyponex wasn't formulated for weed than its not formulated for your plants, they look a bit burnt from all the shit fertilizer chemicals. Ffof and other cannabis brand soils have a better balance of nutes without extra toxic crap that makes flower beds 'look healthy' keep in mind youll be indirectly smoking that stuff

. Besides weed soil, assume ph(6.5 vital) + salt buildup over nute defs, you'll overfeed much more likely. Water when top inch of soil gets almost dry, 2-5 days, don't make a watering schedule based on what you think but on what the plants tell you. Get some cannabis formulated nutes I started with fox farm which works well but I would look into a 3/4 part nute line that includes calmag.
I'd recommend taking them out and mixing perlite into the soil that makes a massive difference. Also make sure the light is at a proper distance, to top 2-3 times not just once, and lollipop under the first top to get a good mainline hub started, Happy growing !
