North America Native Plant

Omail

Botanical name: Buchanania palawensis

USDA symbol: BUPA16

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Omail: The Hidden Gem of Pacific Island Gardening If you’re gardening in the tropical Pacific and looking for a native tree that combines natural beauty with ecological benefits, let me introduce you to the omail (Buchanania palawensis). This wonderful native species might not be the most famous tree in the ...

Omail: The Hidden Gem of Pacific Island Gardening

If you’re gardening in the tropical Pacific and looking for a native tree that combines natural beauty with ecological benefits, let me introduce you to the omail (Buchanania palawensis). This wonderful native species might not be the most famous tree in the Pacific plant world, but it’s certainly one worth considering for your landscape.

What Makes Omail Special?

Omail is a perennial tree that naturally develops a single trunk and can reach impressive heights of 13-16 feet or more, making it an excellent choice for creating natural shade and structure in your garden. As a woody plant, it provides that permanent backbone that every landscape needs, while its compound leaves create an attractive tropical canopy.

Where Does Omail Come From?

This beautiful tree is native to the Pacific Basin, specifically thriving in the natural environments of Guam and Palau. Being a true native means it has evolved perfectly to handle the unique climate and growing conditions of these Pacific islands, making it a smart choice for sustainable, low-maintenance gardening.

Why Choose Omail for Your Garden?

There are several compelling reasons to consider adding an omail to your landscape:

  • Native authenticity: You’re supporting local ecosystems and preserving indigenous plant heritage
  • Natural adaptation: It’s already perfectly suited to local growing conditions
  • Structural beauty: Creates an excellent shade tree and landscape focal point
  • Ecological benefits: Supports local wildlife and pollinators with its small, clustered flowers
  • Low maintenance: Once established, native plants typically require less intervention

Growing Conditions and Care

Omail thrives in tropical climates, specifically USDA hardiness zones 10-12. If you’re outside these zones, this tree unfortunately won’t survive your winters. For those lucky enough to garden in tropical Pacific locations, here’s what your omail needs:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil that doesn’t stay waterlogged
  • Water: Consistent moisture, especially during establishment
  • Climate: Warm, humid tropical conditions year-round

Planting and Care Tips

Getting your omail established successfully requires some attention to detail:

  • Choose a location with adequate space for the tree to reach its full size
  • Ensure good drainage to prevent root rot
  • Water regularly during the first few years while the root system develops
  • Protect young trees from strong winds that could damage developing branches
  • Allow plenty of room for the canopy to spread naturally

Perfect for Pacific Gardens

Omail fits beautifully into tropical and subtropical landscape designs, particularly in coastal areas where it can handle the salt air and tropical conditions. It works wonderfully as a specimen tree, shade provider, or as part of a native plant garden that celebrates the unique flora of the Pacific islands.

The Bottom Line

If you’re gardening in Guam, Palau, or similar tropical Pacific locations, omail deserves serious consideration. It’s a native tree that offers both beauty and ecological benefits, while requiring minimal intervention once established. Plus, by choosing native species like omail, you’re participating in the important work of preserving Pacific island plant heritage for future generations.

Just remember that this is strictly a tropical tree – it won’t survive in temperate climates. But for those gardening in its native range, omail offers a perfect combination of natural beauty, ecological value, and low-maintenance appeal that’s hard to beat.

Omail

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Sapindales

Family

Anacardiaceae R. Br. - Sumac family

Genus

Buchanania Spreng. - buchanania

Species

Buchanania palawensis Lauterb. - omail

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