Sienna Glen Maple

Botanical Name: Acer x freemanii ‘Sienna’

Alternate Name: Sienna Glen® Freeman Maple

The Sienna Glen Maple is a moderately fast-growing, deciduous maple. It grows to a height of 40-50 feet and a width of 35-40 feet. It has a strong, dense and upright branching structure, with a uniform pyramidal to oval shape. It is one of the hardiest hybrids, grown for its reliable blaze of fall color and its adaptability to different environments.

The Sienna Glen Maple is also known as Acer freemanii ‘Sienna.’ The Freeman maple cultivars are hybrids which were bred from crossing the red maple (Acer rubrum) with the silver maple (Acer saccharum).  The resulting hybrid is a maple that has best qualities from both trees – reliable structure, sturdy form, and dazzling fall color from the red maple, and adaptability and a faster growth rate from the silver maple.

The leaves of the Sienna Glenn Freeman Maple are a handsome dark green with a flash of silver on the undersides. This hybrid blooms with a modest display of red flowers in the spring before the leaves fill in. The samaras that follow are sparse and not a good source of food for birds. However, they can nest in its dense branches and feast on insects. The leaves provide a bright red display in the fall, with tones of yellow, orange, and purple.

Acer x freemanii ‘Sienna’ is highly adaptable to different soil types and is suited to many different environmental conditions. This tree is tolerant of urban pollution, salt, alkaline soil, flooding, and drought. For this reason, it makes an excellent street tree, lining larger boulevards.


Height: 40-50 ft.

Width: 35-40 ft.

Shape: Oval/Pyramidal

Flower Color: Red

Flowering Time: April

Fall Color: Yellow, Orange, Red, and Purple

Features: Spectacular fall display, symmetrical pyramidal form

Exposure: Full Sun to Part Shade

Watering: Moderate & Regular

Soil: Prefers moist, acidic, well drained soil, but adaptable to many types of soil

Growth Rate: Moderate-Fast

USDA Zones: 3-7

Uses: Shade tree, lawn tree, accent tree, park tree, lining parkways, street tree

Similar trees: Acer x freemanii 'Jeffersred,’ Acer x truncatum 'Warrenred,' Acer x freemanii 'Celzam'