Closed irrigation hydro system with clay balls. If it is too soon, will I have issues ? And what PH do you use ? I read it should be 6.3-6.4 at this stage but Canna advises 6.2 max. Thanks !
No, as soon as there are small "budlets" or tufts of pistils form, this is when to start on the P/K, a little at first then a bit more as flowering progresses.