I'll be using Arbutus Unedo Compacta spaced ~4 feet apart for some privacy along a fence. I'm just not sure what to plan beneath and in between them. Considering evergreen varieties of blueberry and lavender (for the shrubby components), and I have no clue what to use for perennial flowers. I like the idea of year round interest, and non-toxic for dogs/kids. Thoughts? Thanks!