Pretty much the same as all hydrangeas, they prefer acidic soil so change your pH.

Here is a link that might be useful: Growing Hydrangeas

PeeGee's (Hydrangea paniculata 'Grandiflora') requires some direct sunlight, about 6 hours daily, to bloom well. They will not flower at all in full shade. It blooms on new wood, in mid to late summer, so can be pruned or shaped in the spring. Soil type is not that important, but a sandy or other fast draining soil will require frequent irrigation until the shrub/tree is well established. Once established, it is very drought tolerant.They can be grown as a multi-trunk shrub or trained/pruned into a single standard tree form. In either case, they can become very large, width & height, so allow plenty of room for them to grow.
They are probably the most cold hardy of all Hydrangea species. During the recent cold blast, my temperatures were in the mid 20's for a couple of nights and they sustained no visible leaf damage, while all of the other Hydrangea species and many trees suffered major foliage damage.
If you like white flowers, this is an easy plant to grow.
Rb

Here is a link that might be useful: Hydrangea paniculata - PeeGee & Family

Thanks for the advice! Getting sun will be no problem. I am planting in a full sun area that gets no less than 8 hrs. sun a day. I am planting in an area in which I need a decorative tree to give shade to some other plants that need the shade (one is a Miranda Hydrangea) which needs more shade than it's going to get in that sunny spot. I hope the PeeGee grows fast! I do water that area regularly every summer (every day).

I wanted a tree, not enormous, but large enough to provide some shade to an area that really doesn't get any shade to speak of. It sounds like this one can take (once established) the kind of crazy weather we can get here in the Ozarks. Dry summers almost to drought, late freezes, geez... I think we've had it all.