Julia I was referring to transplanting from well established clumps, sorry I didn't make it clear. Although sometimes people have trouble getting nursery plants to grow it happened to my sister. We lived in the same town and for some unknown reason she had trouble I believe she tried a second time with another plant before she got it to grow.
I think the hyssop would give you the color you want that is one plant I don't have so am not sure how easy it is to transplant but it looks like you have plenty so could take some from the outside edge and give it a try.
Gardens are always kind of trial and error anyway until you know what will work in your soil and climate. My garden is always changing in some way that is what keeps it interesting. One thing I think every long term gardener learns is patience it takes a long time to establish a garden.
