Hi - my first post here. somehow all google roads keep pointing to this site, so figured i'd give my question a shot.
Anyone see objections to a 4 to 8 foot hugelkulture mound, with most of the height made of hardwood brush? My goal would be brush decomposition (not so much garden cultivation on top of it); a few cubic yards of black gold years hence would a-ok too.
not sure if there is an upper limit to brush height / height between ground & humus layer for the initial magic to happen. there's be some limbs up to 6" diameter, but since most would be brush smaller than that, I assume the pile would drop somewhat quickly...if initial height doesn't forestall that.
Can't see why not maybe plant it in a legume for nitrogen fixation to help with the decomposition.
Also id make some mushroom slureys. This could be a good way of growing mushrooms from brush instead of bigger logs.
There is a general rule that in fire prone areas you don't make wood chip piles deeper than like 8" because the heat of the composting plus the combustability of the wood can lead to spontaneous combustion. That'd be my only concern- combustability. If it's all filled and covered with dirt, I don't think that's a problem though.