North America Non-native Plant

Nyasaland Mahogany

Botanical name: Khaya anthotheca

USDA symbol: KHAN

Life cycle: perennial

Habit: tree

Native status: Non-native, reproduces and persists in the wild in Puerto Rico  

Synonyms: Khaya nyasica Stapf ex Baker f. (KHNY2)   

Nyasaland Mahogany: A Stately African Giant for Spacious Landscapes If you’re dreaming of a magnificent shade tree that commands attention and respect, the Nyasaland mahogany (Khaya anthotheca) might just be the towering beauty you’re looking for. This impressive African native has found its way into tropical gardens around the world, ...

Nyasaland Mahogany: A Stately African Giant for Spacious Landscapes

If you’re dreaming of a magnificent shade tree that commands attention and respect, the Nyasaland mahogany (Khaya anthotheca) might just be the towering beauty you’re looking for. This impressive African native has found its way into tropical gardens around the world, including Puerto Rico, where it has established itself as a naturalized resident.

Getting to Know Nyasaland Mahogany

Scientifically known as Khaya anthotheca, this tree goes by several names, including its synonym Khaya nyasica. It’s a true perennial powerhouse—a woody giant that typically soars well beyond 13-16 feet, making it a proper tree by anyone’s standards. In ideal conditions, these beauties can reach truly impressive heights that will have your neighbors craning their necks.

Where Does It Come From?

While Nyasaland mahogany has made itself at home in Puerto Rico as a non-native species that reproduces naturally, its heart belongs to tropical Africa. This tree originally hails from the lush forests of East and Central Africa, where it’s perfectly adapted to warm, humid climates.

Why You Might (Or Might Not) Want This Tree

Let’s be honest—Nyasaland mahogany isn’t for everyone, and that’s perfectly okay! Here’s what you need to consider:

The Good Stuff: This tree is absolutely stunning when mature, with an impressive canopy that provides fantastic shade. Its fragrant white to pinkish flowers are a delightful bonus, attracting bees and other pollinators to your garden. The attractive reddish-brown bark adds year-round visual interest, even when the tree is bare.

The Reality Check: This is a BIG tree that needs BIG space. We’re talking about giving it at least 50 feet of clearance from your house, power lines, and anything else you don’t want potentially damaged by falling branches. It’s also non-native, so if you’re passionate about supporting local ecosystems, you might want to consider native alternatives.

Perfect Landscape Roles

Nyasaland mahogany shines as:

  • A specimen shade tree on large properties
  • A boulevard or parkway tree (where space permits)
  • A focal point for institutional landscapes
  • Part of a tropical or subtropical garden design

This tree is best suited for spacious residential properties, parks, and large institutional settings where its mature size won’t become a problem.

Growing Conditions That Make It Happy

Nyasaland mahogany is fairly adaptable but has some preferences:

  • Sunlight: Full sun to partial shade (though it performs best in full sun)
  • Soil: Well-draining soil that doesn’t stay soggy
  • Water: Consistent moisture, especially when young
  • Climate: Warm tropical to subtropical conditions
  • USDA Zones: 10-12 (sorry, cold-climate gardeners!)

Planting and Care Tips

Successfully growing a Nyasaland mahogany requires some planning and patience:

Location, Location, Location: Choose your spot carefully—this tree will be with you for decades. Ensure you have ample space and won’t regret the location later.

Young Tree Care: Regular watering is crucial during the establishment period. These trees appreciate consistent moisture but don’t like waterlogged conditions.

Maintenance: The good news? Nyasaland mahogany is relatively low-maintenance once established. Minimal pruning is needed, mainly to remove dead or damaged branches.

Wind Protection: In areas prone to strong winds or storms, consider the tree’s location carefully, as large trees can become hazardous in severe weather.

Wildlife and Pollinator Benefits

The fragrant flowers of Nyasaland mahogany are a hit with bees and other pollinators, making it a valuable addition to pollinator-friendly landscapes. While specific wildlife benefits vary by location, large trees like this often provide nesting sites and shelter for various bird species.

Consider Native Alternatives

While Nyasaland mahogany can be a beautiful addition to appropriate landscapes, consider exploring native shade trees for your region. Native species often provide better support for local wildlife and are typically better adapted to local growing conditions. Consult with your local extension office or native plant society for recommendations specific to your area.

The Bottom Line

Nyasaland mahogany is a magnificent tree that can be a stunning addition to the right landscape. If you have the space, patience, and appropriate climate, it offers years of shade, beauty, and pollinator support. Just remember—this is a long-term commitment that requires thoughtful planning and respect for its ultimate size. When in doubt, consult with local arborists or landscape professionals to ensure this tree is right for your specific situation.

Nyasaland Mahogany

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

Meliaceae Juss. - Mahogany family

Genus

Khaya A. Juss. - African mahogany

Species

Khaya anthotheca (Welw.) C. DC. - Nyasaland mahogany

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