Congrats and welcome to hydrangea ownership - my favorite shrub! Summer is the time to just enjoy the blooms as they turn color and to keep the soil moist and the plants out of the hot afternoon sun. The sun fades the color fast. You can prune off the flowers and use indoors or leave them on the shrub to dry. Do not prune your hydrangeas or fertilize in mid summer or in the fall. Wait until early spring when you see signs of new green growth and then if you want blue flowers add aluminum sulfate to make the soil more acid and if you want flowers that are more pink add a cup full of dolomite to the soil around the hydrangeas in the spring. If you are happy with the color you have now you do not need to any supplements to the soil. The blooms may turn more blue over time if your soil is naturally acid and more pink over time if your soil is naturally more basic. Hydrangeas are not heavy feeders like roses so you do not need to fertilize often. One application of Osmocote once a year in late spring is the only plant food I give to my hydrangea collection. May this first plant be the start of your own collection of different hydrangeas. Keep growing, Marianne Binetti    P.S. Some hydrangeas will stay white or cream no matter what you add to the soil.