I managed to complete some hedges for my WW2 project. The trees are from a different bag of trees, and are quite frankly hideous. The foliage is fine, and I applied it with neat PVA glue this time. I will see tonight how well it has solidified as it will have been left for 24 hours.
As it stands though, I think they are promising. A good stop gap until I find a better method perhaps.