Sienna Glen™ has a very uniform branching habit that naturally makes an attractive pyramidal form and is thus highly recommended for planting along boulevards and highways for its consistent beauty. Besides excellent form, the rich green of the summer foliage gives way to a good orange/red fall color. Owing to its hybrid origins, Sienna Glen™ combines adaptability to a wide variety of soil conditions with fast growth. But luckily, Sienna Glen's vigor does not come at the expense of good form or strength against wind breakage! Because of its superior hardiness, Sienna Glen® shows high resistance to frost crackling/sunscald. Sienna Glen™ is recommended from USDA zones 3 to 6.