In late summer, the white flower clusters of this large shrub add a fresh note of bloom that lasts into early fall. The flower clusters, which are sometimes long and pointed and sometimes rounded, open white and gradually change through pink to brown as they age and can stay on the plant through the winter. Native to China and Japan, this is probably the most cold-hardy species of hydrangea. Panicled hydrangea blooms on branches that grow in the current season, so even a harsh winter does not stop the flower show. Because Panicled hydrangea can grow very large and spreading and has a coarse texture, it can be difficult to use in home landscapes, but more compact cultivated varieties have been developed.
- Deciduous (seasonally loses leaves)
- Zone 3
- Zone 4
- Zone 5
- Zone 6
- Zone 7
- Zone 8
- Full sun (6 hrs direct light daily)
- Partial sun (4-6 hrs light daily)
- Alkaline soil
- Large shrub (more than 8 feet)
- Mixed border
- Early winter
- Late summer
- Early fall
- Mid fall
- Late fall
Size and Form
10 to 20 feet high and 10 to 15 feet wide; irregular, upright form.
Tree & Plant Care
Moist, organically rich, well-drained soil. Avoid extremely dry sites.
Plants are shallow-rooted; mulch to keep roots cool.
Prune in late winter or early spring for shape and to encourage vigorous growth and larger flowers.
Will produce flowers on wood produced in the current year.
Disease, pests and problems
No serious problems.
Chlorosis can occur on alkaline soils.
Native geographic location and habitat
Native to China, Japan and Siberia.
Attracts birds and butterflies
Attracts monarch butterflies.
Bark color and texture
Older bark has a handsome gray-brown, ridged and furrowed look.
Leaf or needle arrangement, size, shape, and texture
Simple, opposite, dark green, oval leaves; 3 to 6 inches long with toothed margins.
Fall color is mild; green with a little yellow or purple mixed in.
Flower arrangement, shape, and size
Showy, long-pointed flower clusters bloom in midsummer and last into fall, opening white, gradually changing to pink and then brown. Dried clusters can last all winter.
Fruit, cone, nut, and seed descriptions
The actual fruit (a dry capsule) is not ornamentally important, but the remains of the dry flower heads that surround them do provide winter interest.
Cultivars and their differences
Grandiflora (Hydrangea paniculata 'Grandiflora'): Very large shrub, 10 to 20 feet high and 10 to 15 feet wide. White flowers are densely packed into rounded clusters that can be so heavy they weigh down branches. Prune and thin plant periodically to 5 to 10 primary shoots. Often referred to as the PeeGee hydrangea (for the initials of paniculata 'Grandiflora'). PeeGee is often used to refer to the species, but it actually refers only to this cultivar.
Limelight (Hydrangea paniculata 'Limelight'): Mounded form, more compact than species, 6 to 8 feet high and wide. In July, creamy white rounded flower clusters, up to 8 inches across, emerge on strong, upright stems. As flower clusters mature, their color changes from creamy white to lime-green, rosy pink in fall and beige in winter. Medium-green leaves turn various shades of red in fall.
Little Lamb (Hydrangea paniculata 'Little Lamb'): A compact variety, 4 to 6 feet high and wide. Dense, cone-shaped white clusters of flowers on red twigs appear on upright to arching, stiff stems.
Pee Wee (Hydrangea paniculata 'Pee Wee'): A smaller version of 'Grandiflora', 6 to 8 feet high and wide. One of first panicled hydrangeas to flower, in late June. Flower clusters are 6 inches long, whitish-green, conical. Medium green leaves change to reddish purple in fall.
Pink Diamond: (Hydrangea paniculata 'Pink Diamond'): Upright to rounded shrub, 10 to 15 feet high and 8 to 10 feet wide. Large (8 to 12 inch), cone-shaped flower clusters open in mid- to late summer as creamy-white and then gradually change, starting from the base of the panicle, to a showy dark pink.
Pinky Winky™ (Hydrangea paniculata 'DVP Pinky'): Compact plant, 6 to 8 feet high and wide, has large cone-shaped flower clusters that open white and then change pink from the base, producing a two-tone effect.
Praecox (Hydrangea paniculata 'Praecox'): Large rounded shrub, 10 to 15 feet high and 8 to 10 feet wide, is one of the earliest to bloom. Six inch long, whitish-green conical flower clusters appear on stout stems in late June.
Quick Fire™ (Hydrangea paniculata 'Bulk'): Compact, mounded variety, 6 to 8 feet high and wide; long-blooming, with conical white flower clusters that change from white to a deep rich pink. Dark green foliage. Flowers earlier than other cultivars.
Tardiva (Hydrangea paniculata 'Tardiva'): One of the last hydrangeas to bloom. Large, upright shrub, 10 to 15 feet high and wide, blooms late, in August and September, with showy, white flowers that turn purplish-pink with age. Fast growing
Unique (Hydrangea paniculata 'Unique'): Relatively compact variety, 6 to 10 feet high and wide, has large, creamy-white conical-shaped flower heads on strong stems starting in July.
White Diamonds™ (Hydrangea paniculata 'HYPMADI'): Compact hybrid of 'Pink Diamond' good for small shade gardens. Upright, vase-shaped, 5 to 6 feet high and wide. White flower clusters on upright stems that fade to brown. Leathery dark green summer foliage turns a yellow fall color.