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PlantFiles: Bigleaf Hydrangea, French Hydrangea, Mophead
Hydrangea macrophylla 'Hamburg'

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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: Hamburg

» View all varieties of Hydrangeas

2 vendors have this plant for sale.

One member has or wants this plant for trade.

Height:
36-48 in. (90-120 cm)

Spacing:
36-48 in. (90-120 cm)

Hardiness:
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:
Magenta (Pink-Purple)

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall

Foliage:
Deciduous

Other details:
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Flowers are good for drying and preserving
Provides winter interest

Soil pH requirements:
5.6 to 6.0 (acidic)
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 herbaceous stem cuttings
From softwood cuttings
From semi-hardwood cuttings
By simple layering

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

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Thumbnail #1 of Hydrangea macrophylla by HydroPinke

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Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive DonnaJG On Oct 22, 2009, DonnaJG from Indianapolis, IN wrote:

I absolutely love this hydrangea. I have quite a collection of hydrangeas and this one, if not my very favorite, is very near the top. Actually, I can't think of another hydrangea that I like better. It was especially gorgeous with beautiful deep pink (we have alkaline soil) mophead flowers in late spring/early summer that held the color for weeks, then gradually turned greenish and now in the fall are turning a magnificent red. I visited Heronswood Nursery in 2005 when Dan Hinckley was there on a day that they were featuring lectures on hydrangeas and had all of their beautiful hydrangeas in bloom to choose from. Unfortunately I was not able to attend the lectures (which I regret to this day) but I did purchase several of the hydrangeas with the most gorgeous blooms and 'Hamburg' was one of those. It has been the best of the purchases. It has stayed quite compact--after 4 yrs. without any pruning it has slowly increased each year and is now about 2 1/2 ft. tall and wide. I do protect it in the winter (zone 5/6) by enclosing it with 2 1/2 ft. tall woven wire fencing covered (not over the top--just the sides) with landscape fabric or burlap. After encircling the plant with the fencing (wired together and then anchored with a short rebar post) I pile coarse bark mulch (the free kind tree trimmers provide) to cover the plant. I do this with all my macrophyllas that bloom on old wood. I am not sure if 'Hamburg' blooms on new or old wood (if you know please let me know) but it does bloom more reliably than other macrophyllas that get the same winter protection including 'Endless Summer' and 'All Summer Beauty.' In fairness, my 'Hamburg' is probably planted in an area that is a bit more protected than the two others that I mentioned.

Positive lmelling On Dec 2, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

From the "Encyclopedia of Hydrangeas," (Van Gelderen -2004)," A strong growing shrub with massive foliage. Flowers deep pink or purple, or blue, in huge corymbs, sepals serrate. Flowering time is from Auguest to September. This cultivar is easily confused with its sister seedlinger 'Europa' and 'Altona'. The differences are minor. Still in cultivation. Bred by H. Schadendorff, Germany, in 1931. RHS Award: AGM 1992. Rampp Nursery introduced a different plant (light pink flowers in a tight corymb) with same same in the CITY-LINE series. This ractice is against the ICNCP rules of nomenclature."

No hardiness zone given

In "Hydrangeas for American Gardens," by Michael A. Dirr (2004), it says flowers last an unusually long time and turn red in autumn.

Regional...

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

Indianapolis, Indiana



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