Grow Big is definitely for the Veg phase. However, I include it during the entire grow to keep everything nice and green. It's basically a matter of preference on your feeding regimen. At full nute cycyle I'm throwing in Grow Big, Big Bloom, Tiger Bloom, Kanagroots, Microbe Brew and whichever grow phase of
granules (Open Sesame, Beastie Bloomz or ChaChing). Like I said I cute everything by atleast half and the Auto's seem to like just fine.
I usually don't even need a pH adjustment, the mix is usually ready to go!! Good Luck!!
I usually don't even need a pH adjustment, the mix is usually ready to go!! Good Luck!!