North America Native Plant

Silky Myrtle

Botanical name: Decaspermum parviflorum

USDA symbol: DEPA5

Life cycle: perennial

Habit: shrub

Native status: Native to Pacific Basin excluding Hawaii  

Silky Myrtle: A Hidden Gem of Pacific Island Flora If you’re drawn to the idea of growing truly unique native plants, you might find yourself intrigued by silky myrtle (Decaspermum parviflorum). This lesser-known shrub represents one of nature’s quiet treasures from the Pacific islands, though it’s definitely not your typical ...

Silky Myrtle: A Hidden Gem of Pacific Island Flora

If you’re drawn to the idea of growing truly unique native plants, you might find yourself intrigued by silky myrtle (Decaspermum parviflorum). This lesser-known shrub represents one of nature’s quiet treasures from the Pacific islands, though it’s definitely not your typical garden center find.

What is Silky Myrtle?

Silky myrtle is a perennial shrub that belongs to the diverse world of Pacific Basin native plants. As a member of the myrtle family, it shares DNA with more familiar plants like eucalyptus and tea tree, but has carved out its own niche in the island ecosystems of the Pacific.

This multi-stemmed woody plant typically grows as a shrub, usually reaching less than 13 to 16 feet in height. Like many shrubs, it develops several stems from or near the ground, creating that classic bushy appearance that makes shrubs so valuable in landscape design.

Where Does Silky Myrtle Call Home?

Silky myrtle is native to the Pacific Basin, specifically thriving in Guam and Palau. These tropical island environments have shaped this plant’s characteristics over countless generations, making it perfectly adapted to Pacific island conditions.

Should You Grow Silky Myrtle?

Here’s where things get interesting – and a bit challenging. Silky myrtle falls into that category of plants that botanical enthusiasts love to discover but practical gardeners might find frustrating. While it’s a legitimate native species with potential garden value, detailed growing information is surprisingly scarce.

The Reality Check

If you’re hoping for specific details about:

  • Exact growing conditions and soil preferences
  • Specific USDA hardiness zones
  • Detailed planting and care instructions
  • Pollinator and wildlife benefits
  • Propagation methods

You might find yourself disappointed. This isn’t due to any shortcoming of the plant itself, but rather because silky myrtle hasn’t made its way into mainstream horticulture documentation. It’s one of those plants that exists in the fascinating gap between wild botanical diversity and cultivated garden plants.

For the Adventurous Gardener

If you’re the type of gardener who loves a challenge and wants to work with truly native Pacific species, silky myrtle could be worth investigating further. However, you’ll likely need to:

  • Connect with botanical gardens or native plant societies in Pacific regions
  • Research growing conditions that work for related myrtle family plants
  • Be prepared for some trial and error in cultivation
  • Ensure any plant material is ethically and legally sourced

Alternative Considerations

If you’re drawn to the idea of growing Pacific native plants but want something with more established cultivation information, consider researching other well-documented native species from your specific region. Local native plant societies can be invaluable resources for finding plants that offer the satisfaction of growing natives with the practical advantage of known growing requirements.

The Bottom Line

Silky myrtle represents the fascinating world of lesser-known native plants that exist at the edges of our horticultural knowledge. While it may not be the easiest choice for most gardeners, it serves as a reminder of the incredible plant diversity that exists beyond our typical garden selections. Whether you choose to pursue growing it or simply appreciate it from afar, plants like silky myrtle remind us that there’s always more to discover in the plant kingdom.

Silky Myrtle

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

Myrtales

Family

Myrtaceae Juss. - Myrtle family

Genus

Decaspermum J.R. Forst. & G. Forst.

Species

Decaspermum parviflorum (Lam.) A.J. Scott - silky myrtle

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