Bigleaf Maple (Acer macrophylla ‘Seattle Sentinel’) Posted on April 7, 2012 by Lucile Whitman Bigleaf Maple (Acer macrophylla 'Seattle Sentinel') A tall dense columnar NW native, this tree has yellow fall color. Zone 6. Size: Graft Price: $19.00 Size: 1 gallon Price: $35.00 Size: Field grown Price: $130.00