I use boost as an additive to my GH 3part during the flowering. I start using it 2-3 weeks into flowering. It's expensive, but seems to work. Although, i'm currently looking for a cheaper replacement that offers more.
Hi dude, I pretty much use the whole CANNA range, and a few extra's Trust me CANNA's BOOST is great, I'd also recommend DUTCH PRO'S boost nuit, I personly stuck with CANNA ; Mainly because it was simple to use and mixed well with all my other nuitrients - STELTHY