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PlantFiles: Bigleaf Hydrangea, French hydrangea
Hydrangea macrophylla 'Royal Purple'

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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: Royal Purple

» View all varieties of Hydrangeas

One vendor has this plant for sale.

3 members have or want this plant for trade.

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

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

Hardiness:
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:
Full Sun
Sun to Partial Shade
Light Shade

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Dark Blue
Blue-Violet
Violet/Lavender
Purple

Bloom Time:
Unknown - Tell us

Foliage:
Deciduous

Other details:
Requires consistently moist soil; do not let dry out between waterings
Flowers are good for cutting
Flowers are good for drying and preserving

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)
7.9 to 8.5 (alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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to view:

By lmelling
Thumbnail #1 of Hydrangea macrophylla by lmelling

By lmelling
Thumbnail #2 of Hydrangea macrophylla by lmelling

By lmelling
Thumbnail #3 of Hydrangea macrophylla by lmelling

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive lmelling On Oct 30, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

I was given two of these hydrangea as "liners" by a friend, in fall 2003 along with two Nikko blue, when they were about 6" high and pretty much single stemmed. Other than the name "Royal Purple," I did not have much information on theses two and could not find much on the internet, other than pictures of a fully developed bush.

Because they were so small, I covered the two "bushlets" with our discarded Christmas tree at the end of December, and this was fortuitous as we had one of the most severe winters here in zone 5 in a number of years - extended periods of -25 to -20 degree weather. But the two small hydrangea came through it unscathed and tripled their size this summer, while the two Nikko blue that were also mulched well, but not covered completely, died. Note: another larger Nikko blue that was mulched well, did live over the winter and bloomed, although sparingly.

According to what I learned, this cultivar is supposed to bloom anywhere from a deep cobalt blue to purple, depending on soil. Since our soil here is naturally more acidic, I'm hoping the latter is true. This cultivar appears in the book, "Hydrangeas for American Gardens" by Michael A. Dirr and is said to be the same cultivar as "Mathilda Gutges." According to the description of MG in the book, this should be "a mid to late season bloomer and may have pink, blue or violet flowers or a combination of all three." It should grow to 4' - 5' tall. As Mr. Dirr has a question mark next to the name, it will be interesting to see if it blooms as expected.

So far, these hydrangea seem to be doing well and I am hoping for at least a few blooms in 2005.


Update August 10, 2005

Extreme hot conditions this year, less than 1" of rain in July. Pictures added show Hyd. Royal Purple to have deep magenta blooms in unamended soil. Next year will try acidifying soil slightly to see change in colors. Very slow growing variety, but tolerating dry conditions very well compared to All Summer Beauty and Penny Mac!!!

Regional...

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

Ithaca, New York
Philadelphia, Pennsylvania



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