Ah, good question! And one I had to ponder when considering placement, and even called Brent and Becky's for advice. C. speciosum and C. sativum are in areas that are dry in summer because of tree roots, so not much will grow there anyway. Both are among small spring bulbs, and are in front of larger perennials in large mixed garden spots. C.medius is planted in a groundcover of woolly thyme, that hugs the ground and is completely flat.
Oh, and C. speciocum and C. medius are blooming without foliage. I believe one or both of them will have spring foliage, which will be a good reminder where they are.
