Acer x freemanii ‘Sienna’ – Sienna Glen® Maple

Botanical Name: Acer x freemanii ‘Sienna’

Alternate Name: Sienna Glen® Freeman Maple

The Sienna Glen® Maple (Acer freemanii ‘Sienna’) 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 Freeman Maple hybrids, grown for its reliable blaze of fall color and its adaptability to different environments.

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® 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, birds 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.

The Sienna Glen® Maple 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.