Plantae > Tracheophyta > Magnoliopsida > Rosales > Rosaceae > Sorbus sitchensis > Sorbus sitchensis var. grayiSorbus sitchensis var. grayi (western mountain ash)Synonyms: Pyrus occidentalis (homotypic); Pyrus sambucifolia var. pumila; Sorbus occidentalis; Sorbus sambucifolia var. grayi; Sorbus sitchensis grayi | Allergen Potential [1] | Medium-Low | | Screening - Summer [2] | Moderate | | Screening - Winter [2] | Porous |  | | Bloom Period [2] | Late Spring | | Drought Tolerance [2] | Low | | Fire Tolerance [2] | Low | | Frost Free Days [2] | 3 months 10 days | | Fruit/Seed Abundance [2] | High | | Fruit/Seed Begin [2] | Summer | | Fruit/Seed End [2] | Fall | | Growth Form [2] | Single Stem | | Growth Period [2] | Spring, Summer | | Growth Rate [2] | Slow | | Leaf Type [2] | Deciduous | | Lifespan [2] | Perennial | | Propagation [2] | Bare Root, Container, Seed | | Root Depth [2] | 16 inches (41 cm) | | Seed Spread Rate [2] | Moderate | | Seed Vigor [2] | High | | Seeds Per [2] | 140000 / lb (308647 / kg) | | Shape/Orientation [2] | Erect | | Structure [2] | Tree | | Vegetative Spread Rate [2] | Moderate | | | Flower Color [2] | White | | Foliage Color [2] | Dark Green | | Fruit Color [2] | Red | | | Fall Conspicuous [2] | Yes | | Flower Conspicuous [2] | Yes | | Fruit Conspicuous [2] | Yes | | | Height [2] | 15.088 feet (4.6 m) | | | Hardiness Zone Minimum [2] | USDA Zone: 4 Low Temperature: -30 F° (-34.4 C°) → -20 F° (-28.9 C°) | | Light Preference [2] | Full Sun | | Soil Acidity [2] | Neutral | | Soil Fertility [2] | Intermediate | | Water Use [2] | Moderate |
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Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0
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