All hydrangeas appreciate morning sun and protection from the hot afternoon sun but the Paniculata and arborescens Invincibelle Spirit will thrive in more sun than the big leaf hydrangeas like Endless Summer. In my experience the newer hydrangeas that you mention are very adaptable and have even performed well in full sun if given enough water - but I garden in Western Washington with cool summer weather. In warmer climates they may need more shade. I hope this helps. Remember you can always move any hydrangea that is not doing well. They transplant easily any time of year. Keep growing, Marianne Binetti