North America Native Plant

Almex

Botanical name: Celtis trinervia

USDA symbol: CETR3

Life cycle: perennial

Habit: tree

Native status: Native to Navassa Island âš˜ Native to Puerto Rico âš˜ Native to the U.S. Virgin Islands  

Almex: A Hidden Gem for Tropical Gardens If you’re looking to add authentic Caribbean flair to your tropical landscape, let me introduce you to the almex (Celtis trinervia) – a native tree that’s been quietly beautifying the Caribbean islands for centuries. This delightful species might not have the flashy flowers ...

Almex: A Hidden Gem for Tropical Gardens

If you’re looking to add authentic Caribbean flair to your tropical landscape, let me introduce you to the almex (Celtis trinervia) – a native tree that’s been quietly beautifying the Caribbean islands for centuries. This delightful species might not have the flashy flowers of a hibiscus, but it brings something even more valuable to your garden: authentic regional character and reliable performance.

What Makes Almex Special?

Almex is a perennial woody tree that typically grows as a single-stemmed specimen reaching 13 to 16 feet or more in height. Under certain conditions, it may develop a more compact, multi-stemmed form that stays under 13 feet – perfect for smaller spaces or as an understory tree. This adaptable growth habit makes it a versatile choice for various landscape designs.

Native Status and Where It Grows

Here’s where almex really shines – it’s genuinely native to the Caribbean region. You’ll find this species naturally growing in Puerto Rico, the U.S. Virgin Islands, and Navassa Island. When you plant an almex, you’re not just adding a tree to your landscape; you’re supporting the natural ecosystem and preserving regional biodiversity.

Why Choose Almex for Your Garden?

There are several compelling reasons to consider almex for your tropical landscape:

  • Authentic regional character: As a true Caribbean native, it provides genuine local ecosystem value
  • Adaptable size: Works well in both larger landscapes and more compact garden spaces
  • Low maintenance: Once established, native plants typically require less water and care than non-native alternatives
  • Wildlife support: Native trees provide food and habitat for local birds and beneficial insects
  • Climate resilience: Naturally adapted to local weather patterns and environmental conditions

Ideal Growing Conditions

Almex thrives in tropical and subtropical climates, making it suitable for USDA hardiness zones 10-11. If you live in Puerto Rico, the U.S. Virgin Islands, or similar tropical locations, this tree should feel right at home in your garden.

For optimal growth, provide:

  • Light: Full sun to partial shade
  • Soil: Well-draining soil (specific soil preferences vary, but good drainage is key)
  • Climate: Warm, humid tropical conditions
  • Space: Room for a tree that can reach 13-16+ feet in height

Landscape Design Ideas

Almex works beautifully in several landscape scenarios:

  • Native plant gardens: Combine with other Caribbean natives for an authentic regional landscape
  • Naturalized areas: Perfect for creating wildlife-friendly, low-maintenance garden zones
  • Mixed tropical landscapes: Use as a canopy or understory tree depending on your other plantings
  • Sustainable landscapes: Ideal for water-wise, environmentally conscious garden designs

Planting and Care Tips

Getting your almex off to a good start is straightforward:

  • Planting: Choose a location with adequate space for mature size and good drainage
  • Watering: Provide regular water during establishment, then reduce as the tree matures
  • Maintenance: Native trees typically require minimal intervention once established
  • Pruning: Shape as needed during the growing season, focusing on removing dead or crossing branches

Is Almex Right for Your Garden?

Almex is an excellent choice if you:

  • Live in a tropical climate (zones 10-11)
  • Value native plants and supporting local ecosystems
  • Want a reliable, adaptable tree for your landscape
  • Prefer lower-maintenance plantings once established
  • Have space for a medium-sized tree

However, almex might not be the best fit if you’re looking for showy flowers, live outside tropical zones, or need a very compact plant for tight spaces.

Supporting Caribbean Biodiversity

By choosing almex for your garden, you’re making a choice that goes beyond aesthetics. You’re supporting the preservation of Caribbean flora and creating habitat that local wildlife recognizes and can use. In a world where many landscapes are dominated by non-native plants, every native tree makes a difference.

Whether you’re creating a new tropical garden or adding to an existing landscape, almex offers the perfect combination of authentic regional character, adaptability, and ecological value. It’s proof that sometimes the most rewarding garden choices are the ones that have been thriving in your region all along.

Almex

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Hamamelididae

Order

Urticales

Family

Ulmaceae Mirb. - Elm family

Genus

Celtis L. - hackberry

Species

Celtis trinervia Lam. - almex

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