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PlantFiles: Floribunda Rose
Rosa 'Margaret Merril'

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Margaret Merril
Additional cultivar information: (aka Harkuly)
Hybridized by Harkness; Year of Registration or Introduction: 1977

» View all varieties of Roses

2 members have or want this plant for trade.

Cluster-flowered (incl. Floribunda & Grandiflora)

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

24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

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)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Bloom Color:
White (w)

Bloom Shape:
Tea shaped

Flower Fragrance:
Very Fragrant

Bloom Time:
Late Spring/Early Summer
Blooms repeatedly

Can be trained as a standard or tree form

Patent Information:

Other Details:
Susceptible to black spot
Susceptible to mildew
Susceptible to rust

Pruning Instructions:
Blooms on new wood; prune early to promote new growth

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

Propagation Methods:
From softwood cuttings
From semi-hardwood cuttings
From hardwood cuttings
By grafting
By budding

Click thumbnail
to view:

By Paulwhwest
Thumbnail #1 of Rosa  by Paulwhwest

By Paulwhwest
Thumbnail #2 of Rosa  by Paulwhwest

By Redkarnelian
Thumbnail #3 of Rosa  by Redkarnelian

By venu209
Thumbnail #4 of Rosa  by venu209

By BeaHive
Thumbnail #5 of Rosa  by BeaHive

By baiissatva
Thumbnail #6 of Rosa  by baiissatva

By saya
Thumbnail #7 of Rosa  by saya

There are a total of 10 photos.
Click here to view them all!


2 positives
1 neutral
1 negative

Gardeners' Notes:

Negative AZ_Alkmaar On Jul 18, 2010, AZ_Alkmaar from Westfield, IN wrote:

Very susceptible to black spot in Indiana

Positive baiissatva On Aug 13, 2009, baiissatva from Dunedin
New Zealand wrote:

Zone 9b coastal Otago New Zealand

This is a superb white rose and one of the few that have what I would call a truly spectacular fragrance. It is one of my top 5 roses of all time. I planted it badly in clay last year and it's done fine without a moment's attention, flowering most of the way through winter!

Highly recommended.

Neutral Redkarnelian On Nov 7, 2006, Redkarnelian from Newmarket, ON (Zone 5a) wrote:

Also known as "Margarite Merril".

Positive Paulwhwest On Apr 16, 2004, Paulwhwest from Irving (Dallas area), TX (Zone 8a) wrote:

I ordered this rose from Edmunds Roses last spring and so far it has done very well overall however it has had some black spot problems (most roses do in this area), and the flowers seem to be a favorite of pests.

It's parentage is: (Rudolph Timm X Dedication) X Pascali


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

Washington, Illinois
Wichita, Kansas
Decatur, Mississippi
Brick, New Jersey
Irving, Texas

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