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PlantFiles: Bigleaf Hydrangea, Lacecap
Hydrangea macrophylla 'Shamrock'

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Family: Hydrangeaceae (hy-drain-jee-AY-see-ee) (Info)
Genus: Hydrangea (hy-DRAIN-juh) (Info)
Species: macrophylla (mak-roh-FIL-uh) (Info)
Cultivar: Shamrock
Additional cultivar information: (PP16223)
Hybridized by Mallet; Year of Registration or Introduction: 2004

» View all varieties of Hydrangeas

One vendor has this plant for sale.

Height:
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Spacing:
4-6 ft. (1.2-1.8 m)

Hardiness:
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)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Pink
Red

Bloom Time:
Mid Summer

Foliage:
Deciduous

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Flowers are good for cutting
Flowers are good for drying and preserving

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

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

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There are a total of 9 photos.
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Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive lmelling On Aug 29, 2005, lmelling from Ithaca, NY (Zone 5b) wrote:

I ran across this new cultivar today at a local nursery and decided to give it a try. It is a "Color Choice" plant from Proven Winners. This lacecap is purported to bloom on both new and old wood so would be a good choice for northern gardeners. Mine was not blooming at purchase, however the tag claims, "masses of large doubled, lace-cap flowers bloom white and matures to a stunning reddish pink (alkaline) or violet-purple (acid soil). Splendid in the shade garden as a focal point or foundation planting."

One thing noticeable about this as compared to other macrophya are the leaves, which appear a little darker green than some, and are slightly longer and narrower than others. The tag says that the blooms are nice for use in fresh or dried arrangements. Blooms mid-summer through autumn. Hardy to -30 degrees farenheit (-35C). Zone 4

Regional...

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

Baltimore, Maryland
Ithaca, New York
Bath, Pennsylvania



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