Hydrangea paniculata ‘Grandiflora’ is a large shrub with many firm stems and branches. A severe pruning in spring will promote a large crop of flowers.
Inflorescence: Well-rounded panicles 110 x 120mm across, comprising mostly sterile flowers.
Introduced from Japan by Philip Franz von Siebold in 1862.
Synonyms: H. p. ‘PG’, ‘PeeGee’, ‘Minazuki’
Zones: 3 to 9
Size: Large (to 2.5m).
Color in neutral soil:
Color in acidic soil with AI present:
White (no change)
Ray florets: 4 sepals, rounded, entire, slightly overlapping, 30mm diam.
Leaves: Light green with central vein red on back, 55mm l x 35mm w.