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Panicle Hydrangea, Tree Hydrangea 'Green Spire'

Hydrangea paniculata

Family: Hydrangeaceae (hy-drain-jee-AY-see-ee) (Info)
Genus: Hydrangea (hy-DRAIN-juh) (Info)
Species: paniculata (pan-ick-yoo-LAY-tuh) (Info)
Cultivar: Green Spire
Additional cultivar information:(aka Greenspire)
» View all varieties of Hydrangeas


8-10 ft. (2.4-3 m)

10-12 ft. (3-3.6 m)


Unknown - Tell us


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


Parts of plant are poisonous if ingested

Bloom Color:


Bloom Time:

Mid Summer

Late Summer/Early Fall



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

Gardeners' Notes:


On Dec 3, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

From the sources "Hydrangeas for American Gardens," by Michael A. Dirr (2004), and "Encyclopedia of Hydrangeas" C.J. and D.M. Van Gelderen (2004 - Timber Press):

A very large shrub up to 16 - 20 feet and almost as wide. Branches are more of less pendulous. Leaves are larger than average and are shiny green. Does not flower abundantly and the panicles can be small on older plants but can reach up to 12" long and 8" wide. Ray-flowers are whitish to light green. Flowers late July into September. A seedling of 'Unique'. This cultivar needs a lot of room and is only suitable for larger gardens.