North America Non-native Plant

Asystasia

Botanical name: Asystasia

USDA symbol: ASYST

Life cycle: perennial

Habit: vine

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii âš˜ Non-native, reproduces and persists in the wild in Puerto Rico âš˜ Non-native, reproduces and persists in the wild in the U.S. Virgin Islands  

Asystasia: A Tropical Climbing Beauty That Demands Respect If you’re looking for a fast-growing, flowering ground cover or climbing plant for your warm-climate garden, you might have stumbled across asystasia (Asystasia). This perennial charmer hails from tropical regions and has made itself quite comfortable in several U.S. locations. But before ...

Asystasia: A Tropical Climbing Beauty That Demands Respect

If you’re looking for a fast-growing, flowering ground cover or climbing plant for your warm-climate garden, you might have stumbled across asystasia (Asystasia). This perennial charmer hails from tropical regions and has made itself quite comfortable in several U.S. locations. But before you rush to add it to your garden, let’s dive into what makes this plant tick – and whether it’s the right choice for your landscape.

What Exactly Is Asystasia?

Asystasia is a twining and climbing perennial plant with relatively long stems that can be either woody or herbaceous, depending on growing conditions and age. Originally from tropical Africa and Asia, this adaptable plant produces attractive purple, tubular flowers that add a splash of color to any garden. Its sprawling nature makes it versatile – it can work as ground cover or climb up supports when given the opportunity.

Where You’ll Find Asystasia Growing

This non-native plant has established itself across several warm U.S. regions, including Florida, Hawaii, Puerto Rico, the U.S. Virgin Islands, and some Pacific territories including Palau and the U.S. Minor Outlying Islands. It reproduces spontaneously in the wild without human help and tends to persist once established in these areas.

The Good, The Bad, and The Beautiful

Asystasia offers some definite perks for gardeners in suitable climates:

  • Low maintenance: Once established, it’s relatively easy to care for
  • Pollinator appeal: The tubular purple flowers attract butterflies and other pollinators
  • Versatile growth: Can serve as ground cover or climbing plant
  • Year-round interest: As a perennial, it provides consistent garden presence

However, there are some considerations to keep in mind. As a non-native species that readily establishes itself in the wild, asystasia can potentially outcompete local plants. While it’s not officially listed as invasive, its vigorous spreading nature means it requires careful management to prevent it from taking over your garden or escaping into natural areas.

Growing Conditions and Care

Asystasia thrives in USDA hardiness zones 9-11, making it suitable only for the warmest parts of the United States. Here’s what this plant needs to flourish:

  • Light: Partial shade to full sun
  • Soil: Moist, well-draining soil
  • Temperature: Warm temperatures year-round (frost will damage or kill the plant)
  • Water: Regular watering, but avoid waterlogged conditions

Planting and Maintenance Tips

If you decide to grow asystasia, here are some key points for success:

  • Plant in spring after all danger of frost has passed
  • Provide support structures if you want it to climb
  • Regular pruning helps control its spreading habit
  • Monitor its growth carefully to prevent unwanted spread
  • Consider container growing to limit its invasive potential

Consider Native Alternatives

Before choosing asystasia, consider exploring native alternatives that might offer similar benefits without the ecological concerns. Native plants support local wildlife more effectively and are naturally adapted to your region’s conditions. Consult with your local native plant society or extension office to discover indigenous climbing plants or ground covers that might suit your landscape goals.

The Bottom Line

Asystasia can be an attractive addition to warm-climate gardens, offering beautiful flowers and versatile growth habits. However, as a non-native species with vigorous spreading tendencies, it requires responsible gardening practices. If you choose to grow it, commit to regular maintenance and monitoring to prevent it from escaping cultivation. For gardeners seeking eco-friendly options, exploring native alternatives might be the more sustainable path forward.

Remember, the best garden plants are those that not only look beautiful but also play well with their neighbors – both in your garden and in the broader ecosystem.

Asystasia

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

Scrophulariales

Family

Acanthaceae Juss. - Acanthus family

Genus

Asystasia Blume - asystasia

Species

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