Sorbus americana

American Mountain Ash

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Deciduous tree native to North America featuring white spring blooms and bright red berries in autumn; requires cold dormancy.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name American Mountain Ash
Family Rosaceae
Genus Sorbus
Species Americana
Origin North America
Blooming Small white flowers in late spring, persistent red berries through winter
Leaf Color Green turning yellow to orange-red in autumn
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
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Care & Maintenance

terrain
Soil

Moist, well-drained loamy soil with slightly acidic to neutral pH; tolerates clay.

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Watering

Water regularly during establishment. Reduce watering significantly in winter dormancy period.

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Sunlight & Care

Prefers full sun for maximum fruiting and color; partial shade acceptable but reduces vigor.

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Fertilization

Apply balanced slow-release fertilizer in early spring before new growth emerges.

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Pruning

Prune after flowering to shape or remove dead wood; avoid heavy pruning late summer.

Pest Control Aphid Caterpillar Scale Insect

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 2 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 8 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
-4° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
20% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
5000 – 30000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1000 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
25% – 65%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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