When to start "feeding" clones

Just wondering when everyone starts to feed their clones. Mine have all rooted and transfered to cups for the time being. Roots almost to the bottom of the cup.

Thinking like 300ppm?? Water is already at 150-175.

I appreciate any input and questions are more then welcome.

Thank you for your time,

As soon as they are rooted you can start feeding.

Thank you !

If you're going to take growing seriously you need to get a quality RO (I have an iSpring)

You simply cannot trust what those ppms in your tap consist of, neither ratio, nor quality

it depends on your medium. they need food as soon as they have roots. doesn't mean you need to start feeding though if you're in soil.

I am in coco. So feeding right away I think is a good plan.

clones aren't quite full sized plants, but they aren't seedlings, either, as soon as you plant them, they can take 200-250 ppm immediately.