Panicle Hydrangea, Tree Hydrangea
Hydrangea paniculata 'Unique'

Family: Hydrangeaceae (hy-drain-jee-AY-see-ee) (Info)
Genus: Hydrangea (hy-DRAIN-juh) (Info)
Species: paniculata (pan-ick-yoo-LAY-tuh) (Info)
Cultivar: Unique
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Height:

8-10 ft. (2.4-3 m)

Spacing:

4-6 ft. (1.2-1.8 m)

Hardiness:

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

Sun Exposure:

Sun to Partial Shade

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Cream/Tan

Bloom Time:

Mid Summer

Late Summer/Early Fall

Mid Fall

Foliage:

Deciduous

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From softwood cuttings

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for drying and preserving

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us

Regional

This plant has been said to grow in the following regions:

Sioux Center, Iowa

, Manitoba

Lakewood, Ohio

Norristown, Pennsylvania

Menasha, Wisconsin

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On Dec 4, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

Information from both "Hydrangeas for American Gardens," by Michael A. Dirr (2004) and "Encyclopedia of Hydrangeas" C.J. and D.M. Van Gelderen (2004 - Timber Press).

'Unique' was grown and introduced in 1968 by the de Belders for its large, pure white sterile florets (about 2" across) and rounded sepals. The showy sepals almost completely conceal the fertile flowers. The inflorenscences may reach 16 inches long by 10 inches wide. A fairly large shrub which should grow 10 - 14 feet high. Later flowering, approximately mid-July in zone 7b.

This cultivar is horribly confused in nursery commerce, and seldom is the true form. Prof. Dirr comments in the above publication that he has grown 3 so-called 'Unique' shrubs, none were true to description above. He stat... read more