Rusty Blackhaw
Viburnum rufidulum 'Royal Guard'

Family: Adoxaceae (a-dox-AY-see-ee) (Info)
Genus: Viburnum (vy-BUR-num) (Info)
Species: rufidulum (roo-FEE-duh-lum) (Info)
Cultivar: Royal Guard
Hybridized by Ned's Nursery

Category:

Shrubs

Trees

Height:

12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)

Spacing:

12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)

Hardiness:

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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Partial to Full Shade

Danger:

N/A

Bloom Color:

White/Near White

Bloom Time:

Mid Spring

Foliage:

Grown for foliage

Deciduous

Shiny/Glossy-Textured

Good Fall Color

Other details:

This plant is attractive to bees, butterflies and/or birds

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

Seed Collecting:

Remove fleshy coating on seeds before storing

Properly cleaned, seed can be successfully stored

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

Regional

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

Calera, Alabama

Clermont, Kentucky

Georgetown, Kentucky

Lexington, Kentucky

Louisville, Kentucky

Nicholasville, Kentucky

Swarthmore, Pennsylvania

show all

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Jul 21, 2007, ViburnumValley from Scott County, KY (Zone 5b) wrote:

'Royal Guard' rusty blackhaw is a stalwart large shrub/small tree, reaching 15' (4.5 m) easily and is the standard bearer for tough viburnums for a large swath of eastern North America.

This species is native from the Virginia coast down through the Florida panhandle, west into central Texas, and north into mid Missouri and southern Indiana and Ohio. It is successfully grown throughout Ohio and Indiana, as well as northern Illinois and Iowa.

'Royal Guard' exhibits extremely lustrous dark green foliage through the growing season, and turns a fine reddish purple in the fall. It flowers heavily, and produces copious fruit that turns dark blue before consumption by birds.

'Royal Guard' rusty blackhaw can grow just about anywhere, but it favors cla... read more