Hybrid Rugosa Rose, Shrub Rose 'Robusta'

Rosa

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rosa (RO-zuh) (Info)
Cultivar: Robusta
Additional cultivar information:(aka KORgosa)
Hybridized by Kordes
Registered or introduced: 1979
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Class:

Hybrid Rugosa

Shrub

Height:

4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)

Spacing:

4-6 ft. (1.2-1.8 m)

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)

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

USDA Zone 10b: to 1.7 C (35 F)

Bloom Color:

Medium red (mr)

Bloom Shape:

Single

Flower Fragrance:

Slightly Fragrant

Bloom Time:

Late Winter/Early Spring

Late Spring/Early Summer

Mid Summer

Habit:

Shrub

Patent Information:

Non-patented

Other Details:

Shade-tolerant

Stems are very thorny

Pruning Instructions:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us

Regional

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

Novato, California

San Jose, California

San Leandro, California

Garden City, Idaho

Buckfield, Maine

Panama, New York

Pekin, North Dakota

Chelan, Washington

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Gardeners' Notes:

3
positives
0
neutrals
0
negatives
RatingContent
Positive

On May 25, 2014, lelamarie from Novato, CA wrote:

Robusta is a great rose. It is a single so it you want the tea long stem rose this isn't it. It has incredible ability to survive in hot dry conditions. Although it seems to come into bloom a little later then others it still blooms from late spring until winter. The flowers are bright red with a yellow stamens. It will get quite tall in our area 9. It is about 8 ft tall and has long very thorny branches. Make sure you plant it away from walk ways or areas you need to get to often. I found this out the hard way. If you want a plant to prevent intruders this is the rose for it. I got caught under it recently doing some work in the yard and had a hard time getting out from under it. So learned my lessen to keep in off the ground, so I can get around it, and keep it trimmed back.
I h... read more

Positive

On Jul 1, 2012, hpt from Garden City, ID wrote:

I understand that in blackspot prone areas this rose can be a problem. Here, in very dry conditions, it is stunning. Non-stop blooms, winter hardy, deep watering once a week, and bullet-proof. It's the rose that draws the eye as much as any other with it's vibrant red (and large) blooms. The color is similar to Altissimo. Great, great rose in the right conditions.

Positive

On May 17, 2010, einhverfr from Chelan, WA wrote:

This rose adds a nice spash of color to a rose hedge as well as (like most rugosas) functioning as an excellent barrier plant. It grows upright quite quickly.

It isn't fragrant though.

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