When to change to flower nutrients

I'd go by the looks of the plant, once there's clear flowering signs I start to switch nutrients. This will usually be a week or two after the flip.

Every company has theirs created diet and plan for feed. Switching to 12/12 is first day of flower, so forget veg stage and go from this point with what your line is offering. Very simple , no ? Plus i found 24 hours are good, they flip way faster, but personally would not risk with 48, just not to make plant go koookoooo ;)))

Hi, I would recommend two keep on giving grow nutrients for two more weeks after you changed to 12/12. If you see any flower indicators earlier than two weeks switch as well. Your plants will keep on growing for roughly two weeks when you flipped the switch, therefore they will benefit more from grow nutrients.