Jacanillo (Wallenia): A Rare Puerto Rican Native Worth Discovering
If you’re looking to add some authentic Caribbean flair to your tropical garden, you might want to learn about jacanillo, a lesser-known native shrub from Puerto Rico. While this plant isn’t exactly mainstream in the gardening world, it represents the unique flora that makes island ecosystems so special.


What is Jacanillo?
Jacanillo, scientifically known as Wallenia, is a perennial shrub native to Puerto Rico. Like many shrubs, it’s a multi-stemmed woody plant that typically stays under 13-16 feet tall, making it a manageable size for most garden settings. What makes this plant particularly interesting is its status as a true Puerto Rican native – it’s part of the island’s natural heritage that has been growing there long before any human cultivation.
Where Does Jacanillo Grow?
Currently, jacanillo is found growing naturally in Puerto Rico. Its distribution appears to be quite limited, which adds to its appeal for gardeners interested in rare and regionally specific plants.
Should You Plant Jacanillo in Your Garden?
Here’s where things get interesting – and a bit challenging. Jacanillo falls into that category of plants that sounds wonderful in theory but comes with some practical considerations:
- Climate Requirements: This is definitely a plant for warm, tropical climates (likely USDA zones 10-11)
- Limited Information: There’s surprisingly little cultivation information available about jacanillo, which means you’d be somewhat pioneering if you choose to grow it
- Sourcing Challenges: Finding jacanillo plants or seeds might require some detective work, as it’s not commonly available in nurseries
Growing Conditions and Care
While specific growing requirements for jacanillo aren’t well-documented, we can make some educated guesses based on its native habitat in Puerto Rico:
- Temperature: Expects warm temperatures year-round with no frost tolerance
- Humidity: Likely prefers the high humidity typical of tropical islands
- Sunlight: Probably adaptable to various light conditions from partial shade to full sun
- Soil: Well-draining soil that doesn’t stay waterlogged
The Bottom Line
Jacanillo presents an intriguing option for adventurous gardeners in tropical climates who want to grow something truly unique. However, the limited availability of cultivation information means you’d need to be comfortable with some trial and error. If you’re in Puerto Rico or a similar climate and can source this plant responsibly, it could be a wonderful way to support native biodiversity in your landscape.
For gardeners outside of tropical zones, or those wanting more reliable options, consider exploring other Caribbean or tropical native plants that are better established in cultivation. Your local native plant society or extension office might be able to suggest alternatives that offer similar regional character with more available growing guidance.
Sometimes the most rewarding plants are the ones that make us work a little harder – jacanillo might just be one of those special discoveries waiting for the right gardener to give it a chance.