now i'm very intrigued! thanks for the info's about wood-type chips!
with tink about the dye - uck! and the pieces DH likes to put in are huuuuge, so its very hard to work the soil now...
so ... i'm assuming the smaller wood chips, even if 90% of the mix (as eventually they would be...) work well for the plants and retaining moisture? any you can get them at local nurseries? (i'm not sure i've ever noticed smaller, natural color chips available ... should i check closer?)
much appreciated info!