With the recent good weather I've been able to continue work on upgrading my trees, The remaining twelve trees were treated with my new sawdust mix, it's lighter then what I used to use, but that should provide some contrast.
In addition I finished four new trees made using plant prunings for the trunk/branches. The big problem here was fixing them securely to the base and I ended up drilling out a pilot hole and then using a countersunk screw to fix it in place. Quite a bit of effort for a marginal improvement in appearance.
A before/after picture is in an earlier post