hey dude, there's a popular notion going around that everyone's using way too much Phos. in the flowering stage. Lots of bucks are made selling that stuff to growers. If the ash is black, taste is off and the joint isn't staying lit for more than one or two hits, it could very well be too much Phos during the grow. Flushing will not help this.They say what flowers really need is some N low doses combined with Potash(higher doses). I use Gorilla Gold(00-00-50) adding fruit bats shit to up the N a tad.
Lastly, super resined herb, not really dried all the way, then cured by gassing every 3 days by releasing built up gasses and adding fresh air will not ever burn well.
NC ~