Colorado Spruce, Blue Spruce
Picea pungens 'St. Mary's Broom'

Family: Pinaceae (py-NAY-see-ee) (Info)
Genus: Picea (PY-see-uh) (Info)
Species: pungens (PUN-gens) (Info)
Cultivar: St. Mary's Broom

Category:

Conifers

Foliage Color:

Blue-Green

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

Height:

18-24 in. (45-60 cm)

Spacing:

24-36 in. (60-90 cm)

Hardiness:

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

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

Danger:

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Inconspicuous/none

Bloom Time:

N/A

Foliage:

Grown for foliage

Evergreen

Provides winter interest

Other details:

Unknown - Tell us

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

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:

By grafting

Seed Collecting:

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:

Rock Island, Illinois

Minneapolis, Minnesota

Belfield, North Dakota

Cincinnati, Ohio

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Mar 12, 2006, conifers from Rock Island, IL (Zone 5b) wrote:

A very beautiful Miniature selection of Colorado Blue Spruce growing about 1" per year. Plant is globose but with age becomes more spreading than upright. It is said that a 20+ year-old specimen of this cultivar is likely to die for no sudden reason. A marvelous plant, nonetheless.

Positive

On Mar 4, 2004, Todd_Boland from St. John's, NL (Zone 5b) wrote:

A lovely dwarf blue spruce. This cultivar arose as a witch's broom on 'Mongomery', itself a dwarf blue spruce. The blue needles provide year-round interest.