As summer winds down we are still inumdated with spactacular floral displays of Hydrangeas.  The last hydrangea to bloom each year is the one we call the Panicle hydrangea (Hydrangea paniculata) with its conical shaped flowers of pure white that stand upright on the ends of each stem.   This hydrangea hails from China and Japan came to our country in the late 1800's.  I love to use this hydrangea in the landscape especially where I have more sun than shade since this one will stand up to the harsh light of summer.  For years our only choice was the cultivar called 'PeeGee' with its large double-petaled blooms that almost made the stems weep with their weight.  Fortunately with the widespread popularity of hydrangeas, plant breeders began to release superior selections of the paniculata types just as the did with H. macrophylla and H. quercifolia.  I rellay like 'Unique', 'Tardiva', 'Limelight' and 'Pink Diamond'.  For smaller spaces, the cultivars 'Chantilly Lace' and 'Little Lamb' grow only about four feet tall.   As the season changes from summer to fall, many of these flowers will fade from white to cream or rose-pink that is very attractive as well.  Extend your hydrangea season by planting a few of the H. paniculata selections in your garden.