Proboscidea Species, Louisiana Devil's Claw, Ram's Horn, Unicorn Plant

Proboscidea louisianica

Genus
Proboscidea (pro-bosk-ee-DEE-uh)
Species
louisianica (loo-ee-see-AN-ih-kuh)
Synonym
Sun Exposure
Full Sun
Height
24-36 in. (60-90 cm)
Spacing
12-15 in. (30-38 cm)
Hardiness
Not Applicable
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Pink
Bloom Time
Late Summer/Early Fall
Other Details
Category
Annuals
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
From softwood cuttings
From seed; sow indoors before last frost
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Vincent, Alabama

Golden Valley, Arizona

Hereford, Arizona

Sonoita, Arizona

Sun City West, Arizona

Ashdown, Arkansas

Calistoga, California

Chico, California

Citrus Heights, California

Folsom, California

Menifee, California

Sanger, California

Santa Cruz, California

Snyder, Colorado

Springfield, Colorado

Bartow, Florida

Lilburn, Georgia

Lewiston, Idaho

Tipton, Indiana

Marquette, Kansas

Osborne, Kansas

Barbourville, Kentucky

Princeton, Kentucky

Mason, Michigan

Little Falls, Minnesota

Albuquerque, New Mexico

Roswell, New Mexico(2 reports)

Socorro, New Mexico

Cincinnati, Ohio

Hulbert, Oklahoma

Tiller, Oregon

Lebanon, Pennsylvania

North Augusta, South Carolina

De Leon, Texas

Kerrville, Texas

Lake Dallas, Texas

Montague, Texas

Richardson, Texas

Round Rock, Texas

San Antonio, Texas

Snyder, Texas

Spicewood, Texas

Weatherford, Texas

Wichita Falls, Texas

Onancock, Virginia

Ferndale, Washington

Kalama, Washington

Twin Lakes, Wisconsin

West Bend, Wisconsin

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Featured Videos

Gardener's Notes:

20
positives
4
neutrals
3
negatives
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L
Marquette, KS | August 2018 | negative

When I was growing up on the farm with beef cattle, we hated the Devil Horn/Claw. The dried seed pod would get lodge into cattle's nose....Read More

P
Sanger, CA | June 2018 | negative

My property is the only property on the block that has this weed on it. I live in Sanger/ fresno county , California. And our property is...Read More

B
Hereford, AZ | December 2017 | positive

I live on a family ranch that shares 10 miles of the border with Mexico. The Devil's Claw is prolific in the Palominas & Hereford AZ ar...Read More

L
Santa Cruz, CA (Zone 9b) | August 2016 | positive

I used to live in Chico (CA) and the plant grew VERY well there in the heat and all. Now, I'm in Santa Cruz (CA) & it's growing this yea...Read More

M
M
Roswell, NM | September 2015 | positive

I'm glad to find this site. My Niehbor this year had a devils horn plant pop up in his garden. Who knows were the seed came from. I was s...Read More

C
Chico, CA | June 2014 | positive

We had a ranch in the Dunnigan Hills and as a child I would see this around the countryside. My grandmother would save the claws and pain...Read More

R
R
Round Rock, TX | July 2013 | negative

This plant secrets a nasty sticky substance. I have been struggling to rid my pastures of this plant here in Texas. Anyone know how to ...Read More

M
Eau Claire, WI | June 2013 | positive

In Wisconsin, I struggle a bit to get it to germinate outdoors so I start them indoors with better success, but takes a while.
Gr...Read More

W
W
Cincinnati, OH | March 2011 | positive

I love this plant. I make sculptures from the dried pods. I grew 500 plants one year (1992) in Kentucky and I still have pods left. I gre...Read More

F
Lebanon, PA | September 2009 | neutral

I had this strange stinky plant growing on the edge of one of my flower beds. Thought it was a pumpkin at first. No one could identify it...Read More

D
D
West Bend, WI | July 2009 | positive

This plant appered this spring. I'm sure it came from my birdfeeder. The chipmunks planted it for me. Looked like a hairy sunflower seedl...Read More

D
Albuquerque, NM (Zone 7a) | March 2009 | positive

Grows fine here, but not surprising given that some varieties are native to the desert southwest. Probably not considered a pretty plant...Read More

A
Socorro, NM | July 2008 | positive

It tolerates the high ph we have in the New Mexico desert, and looks good. I pick the immature fruits and add them to the cucumbers when...Read More

S
Snyder, TX | September 2007 | positive

I love the look of the plant, but it has spread through our pasture quickly ( I personly don't care but you know...) The pods were hidin...Read More

T
Aurora, IL | March 2007 | neutral

Can be nasty plant. Invasive. Sticky and slimey. Stinky. There are restriction on it being shipped to certain parts of the world. Ch...Read More

W
W
Hulbert, OK (Zone 7a) | February 2007 | positive

The first year I grew, or tried to grow, Devil's claws, I thought the seeds might have been bad. Little did I realize, the seeds require ...Read More

V
Bliss, NY | June 2006 | positive

I discovered this plant through The International Carnivorous Plant Society. Yes, it's considered borderline or arguably carnivorous bec...Read More

T
Weatherford, TX | June 2006 | positive

i live in west texas near weatherford, and there are more of these than weeds. they stink like underarm smell and when you touch the plan...Read More

M
M
Tipton, IN (Zone 5a) | August 2004 | positive

I received seeds for this plant several years ago. It doesn't reseed in my climate (Indiana zone 5). Friends were quite intriqued with ...Read More

R
Wichita Falls, TX | August 2004 | positive

Though this is considered a noxious weed in these parts, I've been facinated by this plant since I got one during show and tell in first ...Read More

J
J
San Antonio, TX | July 2004 | positive

Growing wild on our lot in Texas Hill Country, Bexar County, just north of San Antonio. Grows "like a weed"! Tolerant of heat and droug...Read More

F
F
Folsom, CA | July 2004 | positive

I have one specimen in my back yard--Folsom, CA. The backyard is an eclectic collection of shrubs and a few trees; no lawn to mow! The De...Read More

P
| March 2004 | positive

I write for kids, so this plant has fascinated me. I live in the southeastern plains of Colorado. We have devil's claw in pastureland nea...Read More

F
Bowie, AZ (Zone 8B) | October 2003 | neutral

This plant grows naturally here in Arizona. It seems to appear most often after our summer rains.

Several years ago I saw...Read More

S
Arlington, TX | October 2003 | positive

The only place I've seen this unusual plant growing wild was in Iowa Park, Texas (up around Wichita Falls), in a farmer's field. This pla...Read More

W
Spicewood, TX (Zone 8b) | October 2003 | positive

This plant makes an EXCELLENT trap plant for tomato hornworms. The year I first noticed this, I picked 48 worms off of four Unicorn Plan...Read More

J
Northern Piedmont, NC (Zone 7b) | March 2001 | neutral

Proboscidea louisianica is a spreading plant grown for its unusual seedpods. It spreads about 18" and has tubular pinkish white ...Read More

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