Photo by Melody

PlantFiles: Corn Cockle
Agrostemma githago

Family: Caryophyllaceae (kar-ree-oh-fil-AY-see-ee) (Info)
Genus: Agrostemma (ag-roh-STEM-uh) (Info)
Species: githago (GITH-uh-go) (Info)

17 members have or want this plant for trade.


18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

9-12 in. (22-30 cm)

Not Applicable

Sun Exposure:
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:
Magenta (Pink-Purple)

Bloom Time:
Mid Spring
Late Spring/Early Summer
Mid Summer


Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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There are a total of 17 photos.
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1 positive
2 neutrals
3 negatives

Gardeners' Notes:

Negative matthewrude On Jul 1, 2011, matthewrude from San Marino, CA wrote:

This plant looked fantastic when I ordered it and when I initially planted. Are you supposed to dead head it?

After about a week to ten days it died right down to the ground.

What could I have done wrong? Any suggestions?

Neutral melody On Mar 2, 2005, melody from Benton, KY (Zone 7a) wrote:

This plant is native to Europe. In England, where 'corn' generally means wheat, Corn Cockle was a weed in grain fields. Before the advent of machine harvesting the separation of the poisonous seeds from the wheat was a tedious procedure.

Positive CatskillKarma On Nov 26, 2004, CatskillKarma from West Kill, NY wrote:

I grew a white cultivar of corn cockles several years ago in my mountaintop garden in the Catskills . I found it easy, although a bit late to flower in my short season garden. It did not self seed. The plants grew about a foot tall, and were pleasant in a meadow-like way.

Negative PvillePlanter On Nov 23, 2004, PvillePlanter from Pflugerville, TX (Zone 8b) wrote:

It has been identified as a noxious weed in Texas as well.

Negative cherishlife On Nov 12, 2004, cherishlife from Pocola, OK (Zone 7a) wrote:

This plant seems to be a noxious weed in a couple of states, according to the USDA website. Arkansas and South Carolina

Neutral smiln32 On Aug 30, 2001, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Hardy Annual. This makes a great cottage garden selection. Grows to a height of 3 feet and bears large, soft pink flowers in the summer. Fast growing plants with lance-shaped leaves will need support with stakes. Seeds are poisonous. Deadhead (remove faded flowers) to prolong flowering and encourage new flower buds. This annual reseeds easily.


This plant has been said to grow in the following regions:

Alameda, California
Grass Valley, California
Long Beach, California
Los Angeles, California
Sacramento, California
San Marino, California
Santa Clara, California
West Kill, New York
Salem, Oregon
Austin, Texas
Kalama, Washington

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