m0useanswered grow question 3 years ago They all are stunned leading me to think its the environment more so the seed.
Are you monitoring the PH of the water going into the pots?
Are you going to monitor the feeding solution as well? its EC/PPM?
I do not see any feeding schedules on your diary, are you feeding them anything?
low light wattage can also cause some dwarfing but not to this degree unless its a standard light bulb.
what are your 90w custom leds like? Are they a flowering lights or just run of the mill bulbs?
If they are just stranded LED's this may also be a reason why they are small. The spectrum is not fulfilling there needs.
All cannabis plants will benefit from any root enhancers, its not needed but helps.
Best Of Luck!