Colorado Blue Spruce
Picea pungens var. glauca
Pinaceae · coniferous tree · native
Last updated
Quick Facts
Height
10–15 ft
Spread
10-20 ft
Growth Rate
Slow
Light
Sun to Part Shade
Soil
Well Drained
Water
Moderate
Hardiness
Zone Zones 3a–8b
Bloom Time
Non-flowering
Origin
the Rocky Mountains, Colorado, Wyoming to New Mexico
Watch for this season
Cytospora CankerHigh
Spring Canker Activation
Damping-offHigh
Spring Sowing - Preemergence Damping-off Risk
RustHigh
Aecial Stage (Alternate Host)
Cooley spruce gall adelgidHigh
Spring Feeding
+ 3 more — see full disease and pest lists below
Phenological Calendar
| Stage | Typical Window |
|---|---|
| New growth flush BBCH 11 | Feb 15-Mar 15 |
| Pollen release BBCH 61 | May 1-May 31 |
| Pollen shed complete BBCH 69 | May 15-Jun 15 |
| Cone development BBCH 71 | Jun 1-Aug 31 |
| Cone maturity and seed shed BBCH 85 | Sep 1-Nov 30 |
Diseases: Regionally Documented (16)
Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Rhizosphaera Needle Cast Oil Discoloration Of Foliage Botrytis Blight Abiotic or viral Bud Failure Cylindrocarpon spp. (now Ilyonectria spp.) Cylindrocarpon Root Rot Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Several soilborne Damping-off Drought Injury Heterobasidion occidentale Otrosina & Garbel Heterobasidion Root Disease Needle Distortion Phytophthora spp. (P Phytophthora Root Rot Phaeolus schweinitzii Schweinitzii root and butt rot Sparassis crispa (syn. S Sparassis Root Rot Fomitopsis officinalis, Porodaedalea pini, and other wood... Stem Decay Diaporthe vaccinii or Diplodia tip blight agents Tip Blight
Pests: Regionally Documented (15)
Elatobium abietinum Spruce aphid Pissodes strobi White pine weevil Oligonychus ununguis Spruce spider mite Coleotechnites piceaella Spruce needleminer Choristoneura fumiferana Spruce budworm Physokermes piceae Spruce bud scale Chionaspis pinifoliae Pine needle scale Orgyia pseudotsugata Douglas-fir tussock moth Adelges cooleyi Cooley spruce gall adelgid Dioryctria spp. Coneworm Cacoecimorpha pronubana Carnation tortrix Hemiberlesia ithacae Hemlock scale Lophocampa argentata Silverspotted tiger moth Cephalcia spp. Western webspinning sawfly Webworm
Data Maturity Structured Multiple sources. Expert review underway.