Ponderosa Pine
Pinus ponderosa
Pinaceae · coniferous tree · native
Last updated
Ponderosa pine is an east-of-Cascades species that does not thrive in the maritime Puget Sound climate. It evolved for hot, dry summers and cold, dry winters. Our wet winters, persistent humidity, and moderate temperatures promote needle casts, cankers, and root diseases that ponderosa rarely encounters in its native range. If planted west of the mountains, it needs the driest, most well-drained microsite available and even then it will underperform. Sequoia pitch moth attacks through any wound; prune only October through January. For most lowland Puget Sound properties, ponderosa pine is the wrong tree. If you want a native pine, shore pine (Pinus contorta var. contorta) is adapted to our conditions.
— Chris Welch, ISA Certified Arborist
Pinus ponderosa (Pinaceae) is a large three-needled pine native across much of western North America from British Columbia to Mexico and east to Nebraska. It reaches 60 to 100 feet tall with a broad, open crown at maturity. The thick, orange-brown bark breaks into large, jigsaw-puzzle-like plates that smell of vanilla or butterscotch when warmed by the sun. Needles are 5 to 10 inches long.
Ponderosa pine thrives in full sun on well-drained soils and is highly drought tolerant once established. It is a fire-adapted species with thick bark that insulates the cambium during surface fires. The species grows from low-elevation grasslands to middle-elevation mountain forests. It is one of the most commercially important timber pines in western North America. Bark beetle is the most significant pest. Hardy in Zones 3a to 8b.