when do i add canna boost and bloombastic?

hi people,iv just bought some bloombastic and canna boost.i have a scrog grow with ak47,amnesia and northern lights under 600w that are 1 week into bloom cycle,right now im using,canna flores,cannazym and rhysotonic,can anyone(with experiance) please tell me when i need to add bloombastic and canna boost and how much i should use per litre,im holding off the pk for another few weeks but am aware i will need this at some point also.thanks bt. ps i have photos of the grow if it helps.

canna boost first 4 weeks then bloombastic last 4 weeks @ 1ml/L