Unique Tubular Petals
Produces distinctive fluted petals that form unusual seashell-like flower shapes.
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Sea Shells Bipinnatus Cosmos is a charming annual flowering plant known for its unusual tubular, fluted petals that resemble delicate seashells. Its blooms appear in attractive shades of pink, white, and rose, adding elegant color and texture to flower beds, borders, and cottage gardens. This easy-to-grow cosmos variety thrives in sunny locations and attracts butterflies and other pollinators, making it a lovely addition to ornamental gardens.
Produces distinctive fluted petals that form unusual seashell-like flower shapes.
Features attractive blooms in shades of pink, white, and rose, depending on the plant.
Grows readily in sunny locations with well-drained soil and moderate watering.
Its open flowers provide a welcoming garden environment for butterflies and pollinators.
| Scientific Name | Cosmos bipinnatus 'Sea Shells' |
| Common Name | Sea Shells Cosmos; Seashell Cosmos |
| Plant Family | Asteraceae |
| Seed Type | Annual Flower Seeds |
| Growth Habit | Upright, branching annual |
| Flower Color | Pink, white, and rose shades |
| Flower Type | Single flowers with tubular, fluted petals |
| USDA Hardiness Zones | Typically grown as an annual in Zones 2–11 |
| Planting Season | Spring, after the last frost |
| Growing Season | Spring through fall |
| Sowing Method | Direct sowing or indoor seed starting |
| Germination Time | Approximately 7–14 days |
| Germination Temperature | 70–75°F (21–24°C) |
| Sunlight Requirements | Full sun |
| Soil Requirements | Well-drained, moderately fertile soil |
| Watering Needs | Moderate; water during dry periods |
| Mature Plant Size | Approximately 3–5 feet tall |
| Plant Spacing | Approximately 12–18 inches |
| Blooming Period | Summer through fall |
| Propagation | Seeds |
Sea Shells Bipinnatus Cosmos adds distinctive floral beauty with its unusual tubular petals and delicate pink and white blooms. Perfect for sunny flower beds, cottage gardens, and cut flower displays, this charming annual creates an attractive seasonal garden filled with color and natural interest.
Learn more about Sea Shells Cosmos flowers, planting, and growing requirements.
Sea Shells Cosmos produces unusual tubular, fluted petals that resemble seashells, unlike the typical flat petals of many other Cosmos bipinnatus varieties. This distinctive flower shape makes it popular for ornamental gardens and floral arrangements.
Seeds generally germinate within 7–14 days under suitable conditions. Plants typically begin flowering around 75–90 days after sowing, depending on sunlight, temperature, and growing conditions.
Yes. Sea Shells Cosmos is suitable for cut flower arrangements because of its unusual petal shapes, attractive colors, and long stems. Harvest flowers when they are freshly opened for decorative indoor displays.