Julia,
I find the semps are all fine with acid pH even calcareum, that grows on limestone. My beds are lined with concrete pavers and I'm sure there is a bit of lime wash from them. The bearded iris get lime so the semps in those beds get it too.
So many of my plants are LIME HATERS that I more worry about killing/ stunting them. The bearded iris I grow in raised beds in almost monoculture.
Am so excited that Lynn and Cynda are coming for a visit on Monday!
Kevin
