When should i use bloom nutes.

Today i saw some white hairs finally. When should i change to bloom nutes? After two weeks? When vertical grow slow down?

Bobkatar said:

Today i saw some white hairs finally. When should i change to bloom nutes? After two weeks? When vertical grow slow down?

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You don't "switch" to bloom nutes
You gradually incorporate them into your veg feed
Reducing one as you raise the other
I feed veg nutrients right up to last two weeks

Stay with your veg regiment until they have flipped and made it to the end of stretch. Then transition to bloom nutes. Keep in mind guaging nitrogen deficit as you continue flowering and add as needed.