Non-native Plants

Wishbone Flower

Torenia asiatica

USDA symbol: TOAS

annual forb

Hawaii: non-native, naturalized

If you’ve been searching for a delightful flowering plant that thrives in those tricky shady spots of your garden, let me introduce you to the wishbone flower (Torenia asiatica). This petite charmer might just become your new favorite for adding splashes of color where other flowers fear to bloom. Wishbone ...

Wishbone Flower: A Charming Shade-Loving Annual for Your Garden

If you’ve been searching for a delightful flowering plant that thrives in those tricky shady spots of your garden, let me introduce you to the wishbone flower (Torenia asiatica). This petite charmer might just become your new favorite for adding splashes of color where other flowers fear to bloom.

What is Wishbone Flower?

Wishbone flower, scientifically known as Torenia asiatica, gets its whimsical common name from the distinctive wishbone-shaped stamens that peek out from its tubular blooms. This annual forb belongs to a group of plants that lack woody stems, making it a soft, herbaceous addition to your garden palette. You might also encounter it under the synonym Torenia glabra, but don’t let the name confusion worry you – it’s the same lovely plant.

Where Does It Come From?

Originally hailing from Asia’s tropical and subtropical regions, wishbone flower has made itself quite at home in various parts of the world. In the United States, you’ll find it growing in Hawaii, where it’s established itself as a non-native species that reproduces naturally in the wild. The plant has adapted well to Hawaiian conditions and tends to persist once established.

  • Species observed
  • No observations

Why Consider Wishbone Flower for Your Garden?

There are several compelling reasons why gardeners fall for this little beauty:

  • Shade tolerance: Unlike many flowering annuals that demand full sun, wishbone flower actually prefers partial shade to full shade
  • Continuous blooms: With proper care, it produces flowers throughout the growing season
  • Compact size: Perfect for containers, borders, and ground cover applications
  • Low maintenance: Once established, it’s relatively easy to care for
  • Pollinator friendly: The small tubular flowers attract bees, butterflies, and other beneficial insects

Garden Design and Landscape Role

Wishbone flower shines brightest when used as a ground cover or border plant in shade gardens and woodland settings. Its compact growth habit makes it an excellent choice for container gardening, where you can move it around to create focal points or fill in gaps in your landscape design. The plant works beautifully in combination with ferns, hostas, and other shade-loving perennials.

Growing Conditions and Care

Creating the right environment for wishbone flower isn’t complicated, but getting these basics right will ensure the best performance:

  • Light: Partial shade to full shade (morning sun with afternoon shade is ideal)
  • Soil: Well-draining, consistently moist soil rich in organic matter
  • Water: Regular watering to maintain soil moisture, but avoid waterlogging
  • Climate: Grown as an annual in most USDA zones, may survive as a perennial in zones 10-11

Wetland Adaptability

Interestingly, wishbone flower has a facultative wetland status in Hawaii, meaning it usually occurs in wetlands but can also thrive in non-wetland conditions. This adaptability makes it quite versatile for different moisture conditions in your garden, though it generally prefers consistent moisture.

Planting and Care Tips

Getting started with wishbone flower is straightforward:

  • Plant after the last frost date in spring
  • Space plants 6-8 inches apart for good air circulation
  • Mulch around plants to retain soil moisture
  • Deadhead spent flowers regularly to encourage continued blooming
  • Provide consistent watering during dry spells
  • Fertilize monthly with a balanced, water-soluble fertilizer during the growing season

A Note About Native Alternatives

While wishbone flower can be a lovely addition to shade gardens, consider exploring native alternatives that might provide similar benefits while supporting local ecosystems. Depending on your region, native options like wild columbine, coral bells, or native violets might offer comparable aesthetic appeal with the added benefit of supporting local wildlife and requiring less maintenance once established.

The Bottom Line

Wishbone flower offers gardeners an easy-to-grow option for adding color to shaded areas where many other flowering plants struggle. While it’s not native to most of North America, it’s generally well-behaved in garden settings and provides value to pollinators. If you’re looking for a reliable annual that doesn’t mind the shade and rewards you with charming blooms all season long, wishbone flower might just earn a spot in your garden rotation.

Torenia asiatica is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Torenia asiatica is also known as:

Torenia glabra | USDA symbol: TOGL3

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Hawaii ()

Facultative Wetland

Hawaii ()

Facultative Wetland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Scrophulariales
Family: Scrophulariaceae Juss. - Figwort family
Genus: Torenia L. - torenia

Species: Torenia asiatica L. - wishbone flower

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