Tree Species Guide

This guide provides information about tree species suitable for the LongTrees initiative, with a focus on species that can potentially live for 1000+ years.

Recommended Species

Bristlecone Pine (Pinus Aristata)

• Potential Lifespan: 4000-5000 years
• Growth Rate: Very slow
• Height: 20-50 feet
• Characteristics:
  • Extremely hardy
  • Drought-resistant
  • Adapted to harsh conditions
  • Distinctive twisted growth

Quaking Aspen (Populus tremuloides)

• Potential Lifespan: 50-100 years (individual stems), but colonies can live for thousands of years
• Growth Rate: Fast
• Height: 40-70 feet (12-21 meters)
• Characteristics:
  • Colonies formed through extensive root systems
  • Heart-shaped leaves with flattened stems, causing leaves to "quake" in the wind
  • Prefers well-drained soil and full sun
  • Often found in large, single-species stands

English Yew (Taxus baccata)

• Potential Lifespan: 2,000-4,000 years
• Growth Rate: Slow
• Height: 30-65 feet (9-20 meters)
• Characteristics:
  • Conical shape with reddish-brown, peeling bark
  • Dark green, needle-like leaves
  • Highly toxic seeds and leaves, except for the red aril surrounding the seed
  • Tolerates a wide range of soils and light conditions

Ginkgo Biloba

• Potential Lifespan: 1,000-2,500 years
• Growth Rate: Slow to moderate
• Height: 66-115 feet (20-35 meters)
• Characteristics:
  • Distinctive, fan-shaped leaves with a long stalk
  • Golden yellow fall color
  • Can thrive in urban environments, tolerating pollution and compacted soil
  • Known for its medicinal properties and as one of the oldest living tree species

Climate Considerations

Local Climate Factors

• Winter hardiness
• Summer heat tolerance
• Precipitation patterns
• Wind exposure

Microclimate Assessment

• Sun exposure
• Wind protection
• Soil conditions
• Water availability

Growth Characteristics

Early Years (0-10)

• Establishment period
• Protection needs
• Growth patterns
• Care requirements

Middle Years (10-100)

• Space requirements
• Maintenance needs
• Expected growth rates
• Potential challenges

Long Term (100+)

• Maximum size expectations
• Environmental impact
• Community considerations
• Legacy planning

Selection Criteria

Site Compatibility

• Space availability
• Soil conditions
• Sun exposure
• Local regulations

Community Considerations

• Cultural significance
• Educational value
• Maintenance requirements
• Long-term impact

Care Requirements

Basic Needs

• Water requirements
• Soil preferences
• Sunlight needs
• Protection needs

Special Considerations

• Disease resistance
• Pest susceptibility
• Environmental adaptability
• Maintenance intensity

TIP

Choose species that are not only long-lived but also well-suited to your local climate and community context.

Additional Resources

Local Expertise

• City arborists
• University extensions
• Local nurseries
• Tree societies

Research Sources

• Botanical gardens
• Academic studies
• Historical records
• Indigenous knowledge

WARNING

Always verify that your chosen species complies with local regulations and is suitable for your specific location.