Japanese Maple 'Twombly's Red Sentinel'

Acer palmatum

Family: Sapindaceae (sap-in-DAY-see-ee) (Info)
Genus: Acer (AY-ser) (Info)
Species: palmatum (pahl-MAY-tum) (Info)
Cultivar: Twombly's Red Sentinel
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Unknown - Tell us


10-12 ft. (3-3.6 m)


8-10 ft. (2.4-3 m)


USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade

Light Shade


Grown for foliage


Good Fall Color

Provides winter interest

Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From woody stem cuttings

From softwood cuttings

From semi-hardwood cuttings

From seed; stratify if sowing indoors

From seed; direct sow after last frost

By grafting

By budding

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Williamsburg, Virginia

Gardeners' Notes:


On Feb 13, 2009, JinnyB from Williamsburg, VA (Zone 7a) wrote:

There is a full grown Japanese Maple out side the window where I work. It is one of the most beautiful trees I have ever seen. In the spring it is a light but brilliant green and darkens throughout the summer. By fall it has turned a soft red and holds its leaves until at least mid November. It is a wide umbrella shape and provides a large shaded area.

I dug up some small trees under the well established tree, being careful to not disturb the roots anymore then necessary. My first efforts did not do well. Later another employee there said he had planted some in a large pot and kept it in a fairly shady location outside and for the most part let Mother Nature do the watering unless we had an extended dry spell. I tried it and they are doing great. My little 4" trees are... read more