Science · Specimen Trees
Torrey Pine
Torrey Pine is associated with restricted coastal populations near san diego and on santa rosa island. Five stout needles per bundle; open windswept crown. Use nursery-propagated stock; island and mainland populations differ. Choose stock and planting space for the species rather than using a generic pine irrigation or pruning prescription.
Profile
- Habitat
- Restricted coastal populations near San Diego and on Santa Rosa Island
- Identification
- Five stout needles per bundle; open windswept crown
- Siting
- Use nursery-propagated stock; island and mainland populations differ
- Light
- Full sun; protect the future root zone from compaction and grade changes.
Water & soil targets
- Moisture (VWC)
- Site-calibrated; varies by soil and rootstock
- Salinity tolerance
- Avoid salt accumulation in the root zone; coastal exposure tolerance is not equivalent to tolerance of saline irrigation.
- Drought tolerance
- Good once established in adapted coastal sites
Optimal root measurement depth
8–18 in
Most absorbing tree roots live in the upper 12–18 inches, out toward the drip line. Typical guidance; confirm with a soil probe on site.
Irrigate young trees until established, then use occasional deep water during exceptional drought; avoid chronic lawn watering around the trunk. Check moisture below the mulch and across the expanding root zone before rewatering.
Problems to watch
- Bark beetles during drought
- Root damage from development
- Branch failure in exposed trees
Stress signs
- Abnormal browning of current foliage or branch tips
- Reduced candle extension and a thinning crown
- Premature needle shedding beyond normal older-needle turnover
Where you'll find it
- Coastal native landscapes
- Ex situ conservation plantings
More specimen trees
General agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.