Hello all. Quick question regarding Telperion field growing technique: I know about the soil mix of 40% pumice, 40% bark fines and 20% composted manure, with the tree roots arranged radially over a tile within the grow bag. What is confusing me is whether the soil mix fills the entire grow bag, or whether it is only the portion above the tile, with native soil placed in the bag below the tile. I could have sworn they said they put native soil in the bottom of the bag. For some reason I cannot find the Telperion podcast to review this.
Anyone out there recall this nuance?
Thanks in advance.