I have been gifted with five Rhodos. I have never planted these before. Two are "Purpureum Elegans", are about 2 1/2 ft tall and very dense and bushy. One is called "Unique" and is about the same size as the first mentioned. These came in 5 gallon pots. I also have two red - not sure of the name - no tag. These came in a 3 gallon pot and are not as tall or as bushy as the other three. I would like to plant these under a mature maple tree, which has loose soil (unlike the rest of the yard - clay). Last year I dug up alders and added compost. This site faces south and will have dappled sunlight. Can you provide any advice about planting and spacing, pruning, etc?? Thanks.