i think you can use it any stage,it is on a few sites,but i looked up seed banks,i think on this site,and seeds under b.c. seeds ,not bud depot,and look under the flowering subtitle,and they have a tiny bit about flowering,then the big mollasses thing from the three little birds,and it does go on,for a bit but a very good bit of info,also good to piss of fire ants,not that we have them in oz?.
i will use it again in my soil grown plants,but not keen on putting dark murky water in my d.w.c. tanks,it may do no harm,but i like my roots nice and white if i can.
i got blackstrap mollasses from a health food store,as the three little birds reckon that was the one they used,but i dont think it matters?.