I put some hay at the bottom to help hold the mix, about 30% loamy screened soil, 50% well cured horse compost, 20% perlite. It soaks water and drains like a champ. I then proceeded to load 50 Willow cuttings and about 15 second-tier haskap cuttings, the ones with sub standard root development that were not potted earlier. They can swim or sink there.
I picked Willow because even with sub standard effort I should get a high survival rate. I want to see what sort of growth I get in one season, both for top and root development. Part two of the experiment is to pull them all once they go dormant and to heel then as a bundle for potting next spring.
While I have some haskaps there I don’t think that they are well suited for an air prune setup, their root system is more shallow and mat-like. Then again I’ll get a chance to see what they do.