Bigcone Douglas-fir
Pseudotsuga macrocarpa
Pinaceae · coniferous tree · introduced
Last updated
Plant Profile
Size & Form
Height
75 ft
Growth Rate
Moderate
Size at 20 yr
24 ft
Lifespan
Long-lived
Site Requirements
Light
Full Sun
Soil Drainage
Well Drained
Soil pH
5.0-7.0
Water
Low
Drought Tolerance
High
Hardiness
Zones 7a–8b
Ornamental Interest
Bloom Time
early spring
Origin
southern California, in mountainous areas from Kern County
Watch for this season
RustHigh
Uredinial Stage (Summer)
AphidHigh
Peak Population & Dispersal
Pine needle scaleHigh
Crawler Emergence
Spring Population Buildup
+ 2 more — see full disease and pest lists below
Diseases: Regionally Documented (12)
Leptographium wageneri Black-Stain Root Disease Gray Mold [VERIFY] Lower Stem Canker Rhabdocline pseudotsugae Rhabdocline needle cast Needle Cast, Swiss Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Botryosphaeria corticis Stem Canker Phoma eupyrena Upper and Lower Stem Canker (Phoma Blight) Yellow-green Mottle Syndrome Diaporthe phaseolorum Upper stem canker Coniferiporia sulphurascens Laminated Root Rot Armillaria spp. — primarily A Armillaria Root Rot
Pests: Regionally Documented (12)
Aphidoidea Aphid Coccus hesperidum Brown soft scale Dioryctria spp. Coneworm Adelges cooleyi Cooley spruce gall adelgid Contarinia pseudotsugae Douglas-fir needle midge Orgyia pseudotsugata Douglas-fir tussock moth Cylindrocopturus furnissi Douglas-fir twig weevil Chionaspis pinifoliae Pine needle scale Synanthedon novaroensis Pitch moth Lophocampa argentata Silverspotted tiger moth Oligonychus ununguis Spruce spider mite Synanthedon sequoiae Sequoia pitch moth
Phenological Calendar
View full calendar (6 stages)
| Stage | Typical Window |
|---|---|
| Bud swell / bud break BBCH 07 | Feb 15-Mar 15 |
| New growth flush BBCH 11 | Mar 1-Apr 1 |
| Pollen release BBCH 61 | Mar 1-Mar 31 |
| Pollen shed complete BBCH 69 | Apr 1-Apr 15 |
| Cone development BBCH 71 | Jun 1-Aug 31 |
| Cone maturity and seed shed BBCH 85 | Sep 1-Nov 30 |
Data Maturity Structured Multiple sources. Expert review underway.