Salix fence post size cuttings will root in molten lava.

The entire genus is rich in auxins & you should have no problem rooting the cuttings. A tea for propagating other species is often made by boiling or soaking Salix twigs.

Al

I regularly cut willow suckers as supports for climbing plants (wisteria, ipomea and clitoria, etc.) that I start in the greenhouse. They go from very cold outside (complete dormancy) to being thrust into service in the greenhouse with no easy climate transition. Almost always they leaf out and root.

Kate

I've an old textbook misplaced around here somewhere that claims that Salix from above 8000 feet are easiest to root, perhaps because they have the most auxins or the right auxins. When the book was written they didn't know why.

Anyhow, just noticed your location and thought you might have access to some of those high altitude Salix.