Hi @tonipuppy you can start using it from the 2nd half of the flowering period, it starts in small doses below what is indicated and it increases gradually, normally from the 4/5 week. good luck mate 🙏💪
I always add Bloombastic in second phase of blooming, when buds are already formed and begin to mature. Be carefull Bloombastic is preatty strong dont overfeed them. good luck ✊