Utah Juniper
Juniperus osteosperma
Cupressaceae · coniferous tree · introduced
Last updated
Plant Profile
Size & Form
Height
15–30 ft
Growth Rate
Slow
Size at 20 yr
25 ft
Lifespan
Long-lived
Site Requirements
Light
Full Sun
Soil Drainage
Well Drained
Soil pH
6.5-8.2
Water
Low
Drought Tolerance
High
Hardiness
Zones 3a–8b
Ornamental Interest
Bloom Time
early spring
Origin
North America
Watch for this season
RustHigh
Uredinial Stage (Summer)
AphidHigh
Peak Population & Dispersal
Spring Population Buildup
Armillaria Root RotModerate
Active Below-ground Growth
+ 3 more — see full disease and pest lists below
Diseases: Regionally Documented (11)
Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Phytophthora spp. (P Phytophthora Root Rot Phomopsis Twig Blight Magnesium Deficiency Canker and Dieback Pear Trellis Rust Armillaria spp. — primarily A Armillaria Root Rot Symptom category — not a single disease Leaf Blight Phoradendron villosum Mistletoe (a True Mistletoe) Seiridium cardinale Seiridium Canker Taphrina wiesneri Witches' Broom
Pests: Regionally Documented (10)
Carulaspis juniperi Juniper scale Oligonychus ununguis Spruce spider mite Various (Agromyzidae, Gracillariidae, Tenthredinidae) Leafminer Juniper fall-webworm Oligotrophus betheli Juniper tip midge Argyresthia cupressella Cypress tip moth Aphidoidea Aphid Otiorhynchus spp. Root weevil Tetranychidae Spider mite Argyresthia spp. Cypress tip moth and allies
Phenological Calendar
View full calendar (5 stages)
| Stage | Typical Window |
|---|---|
| New growth flush BBCH 11 | Feb 15-Mar 15 |
| Pollen release BBCH 61 | Mar 1-Mar 31 |
| Pollen shed complete BBCH 69 | Apr 1-Apr 15 |
| Berry-like cone development BBCH 71 | Jun 1-Aug 31 |
| Berry-like cone maturity BBCH 85 | Sep 1-Nov 30 |
Data Maturity Structured Multiple sources. Expert review underway.