About the only thing I pay attention to is sufficient light and spacing. Tall in the back, short in front. lol. My garden is a jumble and always changing as things thrive or fail. Sometimes I move things and either do it not very carefully or they just don't like their new home - failure. This spring two types of lilies that should have been fine rotted. Drat. I have two of one kind that survived and none of the other but I scattered the 'leaves' of the bulbs in hopes that some had enough life left to grow.
I also try to plant things that will span the short summer from early peonies to late dahlias. I plant some annuals and have tons of poppies (I have collected enough seeds to cover Alaska); hate to let those seed pods go to waste. Mostly somniferum (sp). Keep trying for other types like Icelandic which of course grow well here along with meconopsis (Blue, yellow, lavender and trying for white.)
I will post as things unfurl in the peony department. I do have a couple of tree peonies. Had two beauties a couple of years ago that finally bloomed and were eaten by mice the following winter. I could have cried. I had visions of such beauty for that spring.
