If you have a single story house, planting on the shady part of the yard might be a good idea. As the tree gets taller, it will eventually grow into more and more the sunlight. Otherwise, you can plant on the north side of a tree you will maintain at 15ft. Smaller than 8 ft, I believe it will grow faster in partial shade. Protection from wind is also important. New leaves can get torn up by wind gusts. Yes, it will eventually grow into a 15 x 15 spot in 7 to 10 years. Did PIN have the trees in full sun or in a shade house? I do not agree that these trees require full sun.