How would YOU deal with ants which have nested in a pot containing a
tree?
My solution in the past was to stand the pot in a large bucket of
water, so the pot was completely submerged, and drive out the ants,
and pour the water off when they came to the surface.
A friend has ants in a huge pot containing a fast growing willow!
She has nothing big enough to submerge the pot in, and anyway the pot
is too heavy to lift.
She does not like using chemicals.
Any advice for my friend please? Nothing strenuous as she has ME.

My only other solution in the past was to unpot the tree, wash the
roots clean, and repot in fresh soil, but she would need help to do
that and it's a bit drastic this time of year.
TIA

Pam in Bristol