Agrostemma Species, Common Corn-Cockle, Corncockle

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)



Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Sun to Partial Shade



Foliage Color:

Unknown - Tell us


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


9-12 in. (22-30 cm)


Not Applicable

Where to Grow:

Unknown - Tell us


All parts of plant are poisonous if ingested

Bloom Color:

Magenta (pink-purple)

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Spring

Late Spring/Early Summer

Mid Summer

Other details:

May be a noxious weed or invasive

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


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

Alameda, California

Altadena, 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

Chesapeake, Virginia

Kalama, Washington

show all

Gardeners' Notes:


On May 29, 2015, Morganza from Altadena, CA (Zone 9a) wrote:

Great plant once established. Young plants are a bit difficult to get going as they indicate water needs in the reverse of most others - they wilt when too much water and stand up with less water. Overwatering will kill them in nothing flat. Flowers are great in arrangements. Grows well in containers


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?


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.


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.


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

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


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


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.