On Feb 18, 6:51*pm, Donwill wrote:
Never underestimate WD40.

I once had a large fairy ring in the front garden, about 12' across. I
sprayed the heads with WD40, and then again after about a week.

In the autumn they made a reappearance, and got the same treatment.
The following spring the survivors got another dose, and that was it.
They disappeared never to return.

It was a*lot* *easier than digging up the soil, getting rid of it, and
refilling the hole and replanting.

TF

Don

The environment is full of fungus spores. Absolutely everywhere. They
spring up when conditions allow/are suitable.. The disappearance of
your fairy ring was purely coincidental. WD40 and soil need to be
kept apart.
The only way to prevent fungus from appearance is to render the
environment unsuitable for them to grow.