North America Native Plant

Ram’s Horn

Botanical name: Proboscidea louisianica

USDA symbol: PRLO

Life cycle: annual

Habit: forb

Native status: Non-native, reproduces and persists in the wild in Canada âš˜ Native to the lower 48 states  

Synonyms: Proboscidea louisiana (Mill.) Wooton & Standl., orth. var. (PRLO3)   

Ram’s Horn: The Quirky Annual That Grows Its Own Garden Art If you’re looking to add some serious conversation starters to your garden, meet ram’s horn (Proboscidea louisianica) – an annual plant that literally grows its own craft supplies. This unusual forb produces some of the most distinctive seed pods ...

Ram’s Horn: The Quirky Annual That Grows Its Own Garden Art

If you’re looking to add some serious conversation starters to your garden, meet ram’s horn (Proboscidea louisianica) – an annual plant that literally grows its own craft supplies. This unusual forb produces some of the most distinctive seed pods you’ll ever see, curved and pointed like miniature ram’s horns that seem almost too whimsical to be real.

What Makes Ram’s Horn Special?

Ram’s horn is an annual forb, meaning it’s a non-woody plant that completes its entire life cycle in one growing season. What sets it apart from your typical garden annuals are those famous seed pods that give the plant its common name. The curved, claw-like pods are not just garden eye candy – they’re highly prized by crafters and dried flower enthusiasts.

Before those distinctive pods appear, ram’s horn treats you to large, heart-shaped leaves and trumpet-shaped flowers in shades of purple to pink that attract bees and other beneficial pollinators to your garden.

Where Does Ram’s Horn Come From?

This plant is native to the south-central United States, with its natural range centered around Texas, Louisiana, and neighboring states. However, ram’s horn has made itself at home across a remarkably wide area, now growing in states from coast to coast including Alabama, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, Washington, West Virginia, and Wyoming. It’s also established populations in Ontario and Saskatchewan, Canada, where it’s considered non-native but naturalizes readily.

Should You Grow Ram’s Horn in Your Garden?

Ram’s horn is perfect for gardeners who love unique, conversation-starting plants. Here’s why you might want to give it a try:

  • Those incredible seed pods make fantastic additions to dried arrangements
  • The plant is remarkably low-maintenance once established
  • It’s drought tolerant and heat loving – perfect for challenging sunny spots
  • The flowers provide nectar for pollinators
  • It’s an annual, so you can experiment without long-term commitment

Ram’s horn fits beautifully into cottage gardens, cutting gardens, or any landscape where you want to showcase unusual plants. It’s particularly at home in more relaxed, informal garden settings where its quirky character can shine.

Growing Ram’s Horn Successfully

The good news? Ram’s horn is surprisingly easy to grow. As an annual that can thrive in USDA hardiness zones 3-11, it’s adaptable to most North American gardens.

Planting Tips

  • Direct seed in spring after all danger of frost has passed
  • Choose a sunny location – this plant loves full sun
  • Ensure good drainage; ram’s horn doesn’t appreciate wet feet
  • Space plants adequately as they can spread quite wide

Care Requirements

Once established, ram’s horn is refreshingly low-maintenance. It’s naturally drought tolerant and actually prefers not to be pampered with too much water or fertilizer. The plant typically grows as a spreading annual that can get quite large, so give it room to sprawl.

Understanding Its Water Needs

Ram’s horn shows interesting adaptability when it comes to moisture. In most regions, it’s classified as facultative upland, meaning it usually grows in non-wetland areas but can tolerate some moisture. In the Midwest and parts of the Northeast, it’s even more flexible, growing equally well in wet or dry conditions. This adaptability makes it a resilient choice for gardens with variable moisture levels.

The Bottom Line

Ram’s horn is one of those delightful plants that proves gardens should be fun. While it may not be native everywhere it grows, it’s not considered invasive or problematic. If you’re drawn to its unique character and those amazing seed pods, there’s no reason not to give it a try. Just remember that as an annual, you’ll need to replant each year – though many gardeners find that the plant readily self-seeds in favorable conditions.

Whether you’re a crafter looking for unique materials, a gardener who loves unusual plants, or someone who simply enjoys surprising visitors with something they’ve never seen before, ram’s horn delivers personality in spades.

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 work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags 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. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Atlantic and Gulf Coastal Plain

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Eastern Mountains and Piedmont

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Great Plains

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Hawaii

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Midwest

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Northcentral & Northeast

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Western Mountains, Valleys, and Coast

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Ram’s Horn

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

Pedaliaceae R. Br. - Sesame family

Genus

Proboscidea Schmidel - unicorn-plant

Species

Proboscidea louisianica (Mill.) Thell. - ram's horn

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