North America Native Plant

Sonderegger Pine

Botanical name: Pinus ×sondereggeri

USDA symbol: PISO

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Synonyms: Pinus ×sondereggeri H.H. Chapm., nom. inval. (PISO5)   

Sonderegger Pine: A Rare Native Hybrid Worth Growing Meet the Sonderegger pine (Pinus ×sondereggeri), a fascinating natural hybrid that’s like getting the best of both worlds in the pine family. This unique tree is what happens when longleaf pine and loblolly pine decide to create something special together – and ...

Sonderegger Pine: A Rare Native Hybrid Worth Growing

Meet the Sonderegger pine (Pinus ×sondereggeri), a fascinating natural hybrid that’s like getting the best of both worlds in the pine family. This unique tree is what happens when longleaf pine and loblolly pine decide to create something special together – and the result is pretty spectacular for native plant enthusiasts.

What Makes Sonderegger Pine Special?

Also known as Erambert’s hybrid rosemary longleaf pine (quite a mouthful!), this native beauty combines the elegant long needles of its longleaf pine parent with the adaptability of loblolly pine. As a natural hybrid, it’s like finding a rare treasure in the southeastern pine forests.

This perennial evergreen grows as a stately tree with a single trunk, typically reaching heights greater than 13-16 feet at maturity. Like most pines, it’s built to last and will grace your landscape for generations.

Where Does It Call Home?

Sonderegger pine is proudly native to the southeastern United States, naturally occurring in Louisiana, Mississippi, North Carolina, Texas, and Virginia. Finding this hybrid in the wild is like spotting a botanical celebrity – it exists where the ranges of its parent species overlap.

Why Plant Sonderegger Pine?

Here are the compelling reasons to consider this native hybrid for your landscape:

  • True native credentials: Supporting local ecosystems by choosing plants that naturally belong
  • Unique aesthetic appeal: Combines the graceful form and long needles that make it stand out from typical pines
  • Low maintenance: Once established, requires minimal care like most native pines
  • Wildlife habitat: Provides shelter and nesting sites for birds and other wildlife
  • Conversation starter: The hybrid nature makes it an interesting specimen for plant enthusiasts

Perfect Garden Settings

Sonderegger pine shines in:

  • Large native plant gardens
  • Naturalistic landscapes and restoration projects
  • Properties with ample space for a mature tree
  • Southern-style landscapes celebrating regional flora
  • Areas where you want a unique specimen tree

Growing Conditions and Care

Like its pine parents, Sonderegger pine appreciates:

  • Sunlight: Full sun for best growth and form
  • Soil: Well-draining soils, tolerates various soil types
  • Space: Plenty of room to reach its mature size
  • Climate: Thrives in USDA hardiness zones 7-9

Planting and Care Tips

Getting your Sonderegger pine off to a strong start:

  • Plant in spring or fall for best establishment
  • Dig a hole as deep as the root ball and twice as wide
  • Water regularly the first year while roots establish
  • Mulch around the base to retain moisture and suppress weeds
  • Avoid planting too deeply – keep the root flare visible
  • Once established, these pines are quite drought-tolerant

A Few Considerations

Before planting, keep in mind:

  • This tree needs significant space – plan for its mature size
  • As a hybrid, seeds may not produce true-to-type offspring
  • Availability may be limited due to its hybrid nature
  • Best sourced from reputable native plant nurseries

The Bottom Line

Sonderegger pine offers native plant gardeners something truly special – a naturally occurring hybrid that combines the best traits of two beloved southeastern pines. While it may require patience to source and space to grow, this unique native tree rewards gardeners with distinctive beauty and the satisfaction of growing something genuinely rare and regionally appropriate.

If you have the space and can find one from a reputable source, Sonderegger pine makes an exceptional addition to native landscapes, offering both ecological value and botanical intrigue that will have fellow gardeners asking, What is that beautiful tree?

Sonderegger Pine

Classification

Group

Gymnosperm

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Coniferophyta - Conifers

Subdivision
Class

Pinopsida

Subclass
Order

Pinales

Family

Pinaceae Spreng. ex Rudolphi - Pine family

Genus

Pinus L. - pine

Species

Pinus ×sondereggeri H.H. Chapm. ex Sudw. [palustris × taeda] - Sonderegger pine

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA