Vibrant Purple Blooms
Produces attractive purple to magenta flowers with distinctive dark markings across the petals.
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Purple Agrostemma, commonly known as Corn Cockle, is an attractive annual flowering plant admired for its delicate purple to magenta flowers and slender, upright stems. Its five-petaled blooms feature distinctive dark markings and create a natural, cottage-garden appearance. This ornamental wildflower is suitable for sunny flower borders, cutting gardens, and meadow-style planting areas. Purple Agrostemma grows easily from seeds in well-drained soil and produces colorful summer flowers. Please note that all parts of the plant, particularly the seeds, are poisonous if eaten.
Produces attractive purple to magenta flowers with distinctive dark markings across the petals.
Develops slender, branching stems with narrow green leaves and an elegant upright appearance.
Its graceful stems and colorful blooms make it suitable for fresh floral arrangements and bouquets.
Can be grown directly from seeds in sunny locations with suitable, well-drained garden soil.
| Scientific Name | Agrostemma githago |
| Common Name | Corn Cockle; Corncockle |
| Plant Family | Caryophyllaceae |
| Seed Type | Flower Seeds |
| Plant Type | Annual Flowering Plant |
| Flower Color | Purple to Magenta |
| Bloom Season | Summer |
| USDA Hardiness Zones | Grown as an annual; seasonal suitability depends on local climate |
| Planting Season | Early Spring; Fall in suitable warmer climates |
| Seed Starting | Direct sow outdoors or start indoors approximately 4–5 weeks before the last frost |
| Germination Time | Approximately 7–21 days under suitable conditions; varies by seed lot |
| Germination Temperature | 60–70°F (16–21°C) |
| Sunlight | Full Sun |
| Soil Requirements | Well-drained, moderately fertile soil; avoid excessively rich soil |
| Watering | Moderate watering; maintain suitable moisture during establishment |
| Mature Plant Height | Approximately 24–36 inches |
| Plant Spacing | Approximately 6–12 inches |
| Plant Safety | Poisonous if eaten; particularly the seeds. Keep away from children, pets, and livestock. |
Add natural color and graceful movement to your outdoor space with Purple Agrostemma. Its beautiful purple blooms, slender stems, and attractive flowering habit make it a lovely choice for cottage gardens, wildflower displays, and cutting gardens. Grow this annual flower in a sunny location with well-drained soil and enjoy its seasonal ornamental beauty. Remember that the plant is poisonous if eaten and should be grown responsibly.
Find helpful answers about Purple Agrostemma seed germination, planting seasons, and plant safety.
Agrostemma githago can be grown by directly sowing seeds into prepared garden soil. Sow approximately 1/8 inch deep in a sunny location with well-drained soil. Keep the soil lightly moist during germination. Seeds generally germinate in about 7–21 days under suitable conditions. Thin young seedlings to provide enough room for healthy growth.
Corn Cockle seeds are generally sown outdoors in early spring when the soil can be worked. In warmer climates, fall sowing can also be suitable. Choose a sunny planting location with good drainage. The flowering season is generally summer, although timing depends on the planting date and local climate.
Yes. Agrostemma githago is a poisonous plant, and its seeds are particularly toxic because they contain harmful saponin compounds. Other plant parts can also be harmful if eaten. Do not use these seeds for food or animal feed. Keep the plant and seeds away from children, pets, and livestock, and seek professional medical or veterinary advice if ingestion occurs.