I'm in the beginning stages of constructing hugelkultur bed for noise abatement and privacy. The bed will be about 65 feet long and about 5 feet high in an area of dappled sunlight to shade, due to these conditions I plan on densely growing various shade tolerant palms (chamaedorea radicalis, chamaedorea microspadix, Sabal minor, Sabal brazoriensis, and Sabal Louisiana ), Asimina species, ferns and to be determined. The yard is a warm 8A (temperature range of 8F to 112F not including last Februa