Pine Tree
Pinus spp.
Pine trees are evergreen conifers characterized by needle-like leaves, woody cones, and resinous wood. The bark is typically thick, scaly, and deeply furrowed. A defining feature shown here is the production of amber-colored resin as a defense mechanism against injury or pests.
- Light
- Full sun (6+ hours of direct sunlight per day). They are typically shade-intolerant.
- Water
- Moderate; young trees need weekly watering. Established pines are drought-tolerant but may suffer during prolonged dry spells. Over-watering can lead to root rot.
- Growth
- Perennial evergreen tree; growth form ranges from conical to rounded. Mature height can range from 3 to 80 meters (10 to 260 feet).
Care instructions
Pines are low-maintenance once established. They require full sun and well-draining soil. Minimal pruning is needed unless removing dead wood. Young trees benefit from regular watering and occasional high-nitrogen fertilizer in early spring.
Growing details
Sunlight
Full sun (6+ hours of direct sunlight per day). They are typically shade-intolerant.
Watering
Moderate; young trees need weekly watering. Established pines are drought-tolerant but may suffer during prolonged dry spells. Over-watering can lead to root rot.
Soil
Prefer slightly acidic, well-draining sandy or loamy soils. They can tolerate poor soils but do not like heavy clay.
Hardiness zone
Zones 2-9 depending on the specific species.
Growth habit
Perennial evergreen tree; growth form ranges from conical to rounded. Mature height can range from 3 to 80 meters (10 to 260 feet).
Bloom season
Non-flowering (Gymnosperms); they produce male and female cones, typically in spring, to release pollen.
Propagation
Primarily through seeds (found in cones). Many species require cold stratification to germinate. Large-scale nurseries also use grafting for specific cultivars.
Common pests & issues
Susceptible to Pine Wilt disease, various rust fungi, and bark beetles. Resin flow (gummosis/pitching) is a natural response to these stressors.
Similar species
Spruce (Picea) and Fir (Abies). Pines are distinguished by needles that grow in clusters (fascicles) of 2 to 5, whereas Spruce and Fir needles grow singly on the branch.
Interesting facts
The resin seen in the image eventually fossilizes into amber over millions of years. Pine trees are among the longest-living organisms on Earth; a Great Basin Bristlecone Pine named Methuselah is over 4,800 years old.