So, I'm getting into gardening, because I like cutting stuff and making fire, it's fun.

Now, not sure if this is true but...
Do ashes hold better nutrients for decomposing? or am I wasting time/air/oxygen?

So far I've been burning palm, bamboo, dried grass, virginia creeper and a few other branches.


Also, my decompost pile is really natural, made out of rock, palm for top. Does the top need to be air tight? or I can continue using palm leaves for the top.