Aspen is a soft hardwood known for its workability. One of the most widely distributed trees in North America, aspen has a light colored sapwood with a grayish white to light grayish brown heartwood. Aspen is very light and soft, which makes it a great carving wood. Its lumber is primarily used for pallets, boxes, crating, and panel products. But don’t let this stop you. Aspen can also be used for millwork and furniture.