Mycelium on raised beds
Hi. Looking for some advice please. I built a raised bed using pressure treated sleepers 5 years ago to cover a concrete plinth where there used to be an oil tank, and section of concrete foundations to our back wall. The back neighbours house sits on raised ground above ours and so their garden level is mid way up our back wall. The area is mostly in shade.
I've started getting a white mould / fungus growing on the lining of the sleepers and across the top soil, and along the bottom of the sleepers. It's pretty smelly.
I believe it's called mycelium but open to correction, and I'm assuming it's because it's a predominantly damp area. Is there any way to get rid of the fungus without taking out all the wooden sleepers and replacing with another material? There's some established plants in there now that I'd like to keep if possible.