North America Native Plant

Milktree

Botanical name: Sapium laurocerasus

USDA symbol: SALA8

Life cycle: perennial

Habit: tree

Native status: Native to Puerto Rico  

The Milktree: A Rare Caribbean Gem for Conservation-Minded Gardeners Meet the milktree (Sapium laurocerasus), a fascinating native tree that calls Puerto Rico home. If you’ve never heard of this perennial beauty, you’re not alone – it’s one of the Caribbean’s best-kept secrets, and unfortunately, one of its most endangered botanical ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

The Milktree: A Rare Caribbean Gem for Conservation-Minded Gardeners

Meet the milktree (Sapium laurocerasus), a fascinating native tree that calls Puerto Rico home. If you’ve never heard of this perennial beauty, you’re not alone – it’s one of the Caribbean’s best-kept secrets, and unfortunately, one of its most endangered botanical treasures.

What Makes the Milktree Special?

The milktree is a woody perennial that typically grows as a single-stemmed tree, reaching heights greater than 13-16 feet under ideal conditions. Like many tropical trees, it can sometimes develop a multi-stemmed growth form or stay shorter than expected depending on environmental factors. This flexibility makes it an interesting specimen for various landscape situations.

Where Does It Come From?

This tree is exclusively native to Puerto Rico, making it a true island endemic. Its natural range is limited to this beautiful Caribbean island, where it has evolved to thrive in the unique tropical conditions found there.

The Conservation Concern

Here’s where things get serious, fellow plant lovers. The milktree has a Global Conservation Status of S2, which translates to Imperiled. This means it’s extremely rare, with typically only 6 to 20 occurrences remaining in the wild and possibly just 1,000 to 3,000 individual plants left. This rarity makes it especially vulnerable to extinction.

If you’re considering adding this tree to your garden, you absolutely must ensure any plant material comes from responsible, ethical sources – preferably from conservation propagation programs rather than wild collection.

Growing Conditions and Habitat

The milktree has a wetland status of Facultative Upland in the Caribbean region, which is a fancy way of saying it usually prefers non-wetland conditions but can tolerate some moisture. This adaptability suggests it might work well in average garden conditions, though specific growing requirements aren’t well-documented due to its rarity.

Should You Plant a Milktree?

This is a complex question. On one hand, growing rare native plants can be incredibly rewarding and contributes to conservation efforts. On the other hand, the extreme rarity of this species makes it challenging to source responsibly.

Consider these factors:

  • Only pursue this tree if you can verify ethical sourcing from conservation programs
  • Your climate must be suitable for tropical Caribbean species
  • Limited growing information means you’ll be somewhat experimental in your approach
  • You’ll be participating in important conservation work by maintaining genetic diversity

Alternative Options

If you love the idea of growing Caribbean natives but can’t source a milktree responsibly, consider looking into other Puerto Rican native trees that might be more readily available through ethical nurseries. Many Caribbean islands share similar native species that could provide the tropical aesthetic you’re seeking.

The Bottom Line

The milktree represents both an exciting opportunity and a significant responsibility. Its rarity makes it a conservation priority, but that same rarity means most gardeners should probably admire it from afar unless they can participate in legitimate conservation efforts.

If you do decide to pursue growing this remarkable tree, connect with botanical gardens, conservation organizations, or specialized nurseries that work with endangered Caribbean species. They can provide guidance on proper care and ensure you’re contributing to conservation rather than potentially harming wild populations.

Remember, sometimes the best way to love a rare plant is to support its conservation in the wild while choosing more common alternatives for our home gardens.

Milktree

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

Euphorbiales

Family

Euphorbiaceae Juss. - Spurge family

Genus

Sapium Jacq. - milktree

Species

Sapium laurocerasus Desf. - milktree

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