Bottom of the future bed is lined with seasoned bigleaf maple logs. This is gonna be a hugel-style bed in that it will use this wood to store carbon for future plant growth. The other advantage of doing this is the wood soaks up water during rainy periods and saves it up for the plants to access during dry spells. Next will come layers of finer-grained compostable materials like twigs, wood chips, leaves, grass clippings and plant trimmings.