North America Native Plant

Soft Timonius

Botanical name: Timonius mollis var. mollis

USDA symbol: TIMOM

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Soft Timonius: A Rare Pacific Island Native Worth Knowing About If you’re dreaming of creating a truly authentic Pacific island garden, you might want to learn about soft timonius (Timonius mollis var. mollis). This lesser-known native tree brings a piece of the remote Pacific to your landscape—though it comes with ...

Soft Timonius: A Rare Pacific Island Native Worth Knowing About

If you’re dreaming of creating a truly authentic Pacific island garden, you might want to learn about soft timonius (Timonius mollis var. mollis). This lesser-known native tree brings a piece of the remote Pacific to your landscape—though it comes with some pretty specific requirements that might make you think twice about planting it.

What Is Soft Timonius?

Soft timonius is a perennial tree that’s part of the coffee family (Rubiaceae). Don’t get too excited though—you won’t be brewing any morning joe from this beauty! This woody wonder typically grows as a single-stemmed tree reaching heights of 13 to 16 feet or more, though environmental conditions can sometimes encourage a shorter, multi-stemmed growth habit.

As a true Pacific native, soft timonius calls the islands of Guam and Palau home. It’s specifically native to the Pacific Basin (excluding Hawaii), making it a genuine piece of Micronesian flora that’s perfectly adapted to island life.

Should You Plant Soft Timonius?

Here’s where things get interesting—and a bit challenging. While soft timonius isn’t invasive or noxious, it’s also not your typical garden center find. This tree is naturally suited for very specific conditions that most mainland gardeners simply can’t provide.

Growing Conditions and Care

If you’re determined to grow soft timonius, you’ll need to recreate a slice of tropical paradise:

  • Climate: USDA hardiness zones 10-12 only—this tree needs consistently warm, humid conditions
  • Soil: Well-draining tropical soils that mimic its native island environment
  • Environment: High humidity and protection from cold temperatures
  • Space: Room for a medium-sized tree that can reach significant height

Landscape Role and Design Ideas

In the right climate, soft timonius can serve as an attractive shade tree for tropical gardens. Its natural growth habit makes it suitable for creating canopy coverage in larger landscape designs. However, given its specific origins, it works best in gardens designed to showcase authentic Pacific island plant communities.

The Reality Check

Let’s be honest—unless you’re gardening in Guam, Palau, or a similarly tropical location, soft timonius probably isn’t the right choice for your landscape. The tree’s very specific environmental needs make it unsuitable for most North American gardens, and finding responsibly sourced plants can be extremely challenging.

Better Alternatives for Most Gardeners

If you’re drawn to the idea of a tropical-looking native tree, consider exploring native options from your own region instead. Every area has beautiful native trees that will thrive in local conditions while supporting local wildlife—something that’s much more sustainable than trying to grow a plant from halfway around the world.

For those in truly tropical zones, research native trees from your specific region rather than importing species from distant islands. You’ll have much better success and create a more ecologically beneficial garden.

The Bottom Line

Soft timonius is undoubtedly a fascinating piece of Pacific island biodiversity, but it’s best appreciated in its native habitat or in specialized tropical botanical collections. For most home gardeners, this tree represents more of a botanical curiosity than a practical landscaping choice. Sometimes the most responsible thing we can do as gardeners is admire a plant from afar and choose something more suitable for our local conditions instead.

Soft Timonius

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Timonius DC.

Species

Timonius mollis Valeton - soft timonius

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