Science · Specimen Trees
Bigleaf Maple
A very large western North American maple with notably broad leaves and a wide crown. It performs best where roots can explore moist, deep soil; hot paved sites and restricted root zones can lead to decline.
Acer macrophyllum · Deciduous western shade tree
Profile
- Foliage
- Very large, deeply lobed leaves.
- Habitat
- Pacific western forests, often on moist slopes and stream terraces.
- Planting
- Set the root flare at grade and protect the expanding root zone from compaction.
- Assessment
- Confirm identity, local climate suitability and drainage before prescribing care.
Water & soil targets
- Moisture (VWC)
- Site-calibrated; varies by soil and rootstock
- Salinity tolerance
- Avoid saline irrigation and deicing runoff.
- Drought tolerance
- Moderate on deep soils; limited in hot confined sites.
Optimal root measurement depth
8–18 in
Most absorbing tree roots live in the upper 12–18 inches, out toward the drip line. Typical guidance; confirm with a soil probe on site.
Provide deep establishment watering and supplemental moisture in prolonged dry periods; conserve a broad mulched root zone without keeping the collar wet.
Problems to watch
- Verticillium wilt
- Wood decay
- Drought-related decline
Stress signs
- Leaf-edge scorch
- Sparse crown
- Branch dieback
Where you'll find it
- Large parks and shade
- Riparian restoration
More specimen trees
Coast Live OakSouthern Live OakDate Palm (Medjool)Canary Island Date PalmCoast RedwoodJapanese Maple
All Science profilesGeneral agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.