North America Native Plant

Sloe

Botanical name: Reynosia uncinata

USDA symbol: REUN

Life cycle: perennial

Habit: shrub

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

Sloe (Reynosia uncinata): A Hidden Gem of Caribbean Native Gardening If you’re passionate about native Caribbean plants and love discovering lesser-known treasures, you might want to get acquainted with sloe. This charming native shrub represents the kind of authentic, local flora that makes Caribbean gardens truly special – even if ...

Sloe (Reynosia uncinata): A Hidden Gem of Caribbean Native Gardening

If you’re passionate about native Caribbean plants and love discovering lesser-known treasures, you might want to get acquainted with sloe. This charming native shrub represents the kind of authentic, local flora that makes Caribbean gardens truly special – even if it’s not exactly a household name yet.

What is Sloe?

Sloe (Reynosia uncinata) is a perennial shrub that calls Puerto Rico and the U.S. Virgin Islands home. As a true native species, it’s perfectly adapted to Caribbean conditions and plays its part in the local ecosystem. Like most shrubs, sloe is a multi-stemmed woody plant that typically stays under 13-16 feet in height, though it can occasionally grow taller or develop a single stem depending on its environment.

Where Does Sloe Grow Naturally?

This native beauty is found exclusively in Puerto Rico and the U.S. Virgin Islands, making it a true Caribbean endemic. If you’re gardening in these areas, you’re working with a plant that has been thriving in your local conditions for countless generations.

Should You Plant Sloe in Your Garden?

Here’s where things get interesting – and a bit challenging. Sloe falls into that special category of native plants that are authentic to their region but aren’t widely cultivated or well-documented in gardening circles. This presents both opportunities and considerations:

The Native Plant Advantage

  • Perfectly adapted to local Caribbean climate conditions
  • Supports local ecosystems and biodiversity
  • Likely requires less water and maintenance once established
  • Authentic choice for truly native Caribbean landscaping

The Reality Check

  • Limited availability in nurseries
  • Minimal documented growing information
  • May require patience and experimentation
  • Best suited for dedicated native plant enthusiasts

Growing Conditions and Care

While specific growing requirements for sloe aren’t extensively documented, we can make educated assumptions based on its native Caribbean habitat. This shrub likely thrives in:

  • Tropical to subtropical conditions (probably USDA zones 10-11)
  • Well-draining soil typical of Caribbean environments
  • Partial to full sun exposure
  • Natural rainfall patterns of its native region

As with many native shrubs, sloe probably appreciates consistent moisture during establishment but becomes more drought-tolerant once its root system develops.

Finding and Planting Sloe

The biggest challenge with sloe isn’t growing it – it’s finding it. Your best bet is to:

  • Contact local native plant societies in Puerto Rico or the U.S. Virgin Islands
  • Reach out to botanical gardens or conservation organizations
  • Connect with other native plant enthusiasts who might have experience with Caribbean endemics
  • Consider participating in native plant swaps or seed exchanges

The Bottom Line

Sloe represents the adventurous side of native gardening – it’s for gardeners who love being pioneers and contributing to the preservation of local plant heritage. While you won’t find detailed care sheets or nursery availability like you would for more common plants, that’s exactly what makes plants like sloe special.

If you’re in Puerto Rico or the U.S. Virgin Islands and passionate about authentic native landscaping, sloe could be a fascinating addition to your garden. Just be prepared for some detective work in sourcing it and potentially some trial and error in growing it. Sometimes the most rewarding gardening experiences come from working with plants that haven’t been figured out by everyone else yet.

Remember, every time someone successfully grows and shares a lesser-known native plant like sloe, they’re contributing to preserving Caribbean botanical heritage for future generations. Now that’s pretty special, don’t you think?

Sloe

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

Rhamnales

Family

Rhamnaceae Juss. - Buckthorn family

Genus

Reynosia Griseb. - darlingplum

Species

Reynosia uncinata Urb. - sloe

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