Spring to Summer Finish, 1 ppp
B-9 is effective at controlling height and darkening foliage color, may be required on Berlin. Prune soon after potting will produce a finished product that doesn't open up when it flowers. The key is to make the first prune at the level of the first set of leaves closest to the soil.
Aphids, Leaf Spot, Watch for Mildews
Tired of floppy, weak-stemmed hydrangeas? Cityline is the answer. Large flowers with vivid colors, strong stems and dark glossy foliage. H. macrophylla: Lower pH (5.0 to 5.5) will induce bluer flowers. Higher pH (6.0 to 7.0) will induce pinker flowers. Can be produced as a flowering greenhouse pot crop for Mother's Day.