White Oak Seedlings 4 per order 16" - 20" Beautiful fall colors turning red and producing acorns. Q. alba typically reaches heights of 80 to 100 feet (24–30 m) at maturity, and its canopy can become quite massive as its lower branches are apt to extend far out laterally, parallel to the ground. Trees growing in a forest will become much taller than ones in an open area which develop to be short and massive. The tallest known white oak is 144 feet (44 m) tall.[citation needed] It is not unusual for a white oak tree to be as wide as it is tall, but specimens growing at high altitudes may only become small shrubs