Dying plants, turn yellow then dead

[bcddd214]

you need to switch lighting to 12/12 after about 2-3 weeks or so. depends on how tall you want them. you veg'd them for too long. without changing the light cycle to 12 on 12 off, they never go into flower and make buds. the light cycle changes the hormones in the plant, causing them to flower. take clones (cuttings) and start over.

I thought it was too long....

Thank you very kindly for your insight!!