• Orange Cosmos flowers blooming in a sunny home garden
  • Orange Cosmos flowers blooming in a garden
  • Orange Cosmos flowers blooming in a sunny home garden
  • Orange Cosmos flowers blooming in a sunny home garden
  • Orange Cosmos flowers blooming in a sunny home garden
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EdenValleySeeds

Orange Cosmos Flower Seeds for Planting – Long-Blooming Summer Garden Flowers for Pollinators

Orange Cosmos Flower Seeds for Planting – Long-Blooming Summer Garden Flowers for Pollinators

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$18.89 USD
$18.89 USD
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DELIVERY ESTIMATE
Oct 21 – Oct 23 Estimated arrival
ORDER Oct 11 Order placed
ORDER READY Oct 13 – Oct 14 2–3 business days
DELIVERED Oct 21 – Oct 23 10–12 business days total
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Key Features

  • Produces cheerful orange daisy-like flowers throughout the warm growing season.

  • Cosmos sulphureus is a fast-growing annual suited to sunny garden spaces.

  • Tall, airy plants add color and movement to flower beds, borders, and cottage gardens.

  • Attractive blooms can provide a useful nectar source for visiting pollinators.

  • Easy-to-grow flowers are a good choice for beginner gardeners and seasonal displays.

Growing Benefits

  • Adds bright orange color to summer landscapes and garden beds.

  • Works well in borders, containers, cottage gardens, and pollinator-friendly spaces.

  • Quick germination and vigorous growth make cosmos enjoyable to grow from seed.

  • Flowers over an extended period when regularly harvested or deadheaded.

  • Tolerates warm conditions once established and generally needs modest care.

Seed Specifications

  • Common Name: Orange Cosmos

  • Botanical Name: Cosmos sulphureus

  • Plant Type: Annual flowering plant

  • Colors: Orange, with some blooms ranging toward yellow-orange

  • Height: About two to four feet

  • Sunlight: Full sun

  • Soil: Well-drained soil; moderately fertile soil is suitable

  • Water: Moderate; water regularly during establishment, then allow soil to dry slightly between watering

  • Germination Time: About seven to fourteen days

  • Sowing Depth: About one-quarter inch deep

  • Spacing: About eight to twelve inches apart

  • Growing Zones: USDA Zones two through eleven when grown as an annual

  • Flowering/Maturity: Generally blooms within about two to three months from sowing under suitable conditions

  • Uses: Flower beds, borders, containers, cottage gardens, cut flowers, and pollinator gardens

Growing Tips

  • Sow seeds after the danger of frost has passed and the soil has warmed.

  • Choose a location receiving plenty of direct sunlight for stronger plants and better flowering.

  • Avoid excessive fertilizer, especially high-nitrogen products, which can encourage foliage instead of flowers.

  • Deadhead spent blooms regularly to keep the plant looking tidy and encourage continued flowering.

Seed Storage

Keep unused seeds in their original packet or a tightly sealed container. Store them in a cool, dry, dark location away from heat and moisture. Avoid storing seeds in humid areas such as bathrooms or near sinks.

Unique Facts About Seeds

  • Cosmos seeds are relatively easy to sow because they can be planted directly into garden soil.

  • Cosmos sulphureus is native to parts of Mexico, Central America, and South America.

  • The species is known for warm-toned flowers, especially orange and yellow shades.

  • Cosmos belongs to the Asteraceae family, which also includes sunflowers, daisies, and zinnias.

Growing Instructions

Planting Season: Sow outdoors after the last frost when the soil has warmed. In areas with a long growing season, seeds can be sown directly in the garden.

Sowing: Select a sunny, well-drained location and loosen the soil before planting. Scatter or place seeds over the prepared soil and cover lightly.

Depth: Sow approximately one-quarter inch deep. Avoid burying the seeds too deeply.

Spacing: Thin seedlings to approximately eight to twelve inches apart once they are established.

Sunlight: Provide full sun for the best growth and flowering. A location with several hours of direct sunlight each day is ideal.

Soil: Cosmos grows well in well-drained soil and does not require highly fertile conditions. Avoid poorly drained areas.

Watering: Keep the soil evenly moist while seeds germinate and seedlings become established. Once plants are growing well, water when the soil begins to dry.

Germination: Seeds commonly germinate within approximately seven to fourteen days when provided with suitable warmth, moisture, and growing conditions.

Transplanting: Direct sowing is generally preferred, but seedlings can be transplanted carefully while young. Handle the roots gently and water after planting.

Fertilizing: Use fertilizer sparingly. Excessive nitrogen can promote leafy growth and reduce flowering.

Care: Keep weeds under control while plants are young. Deadhead faded flowers to maintain a neat appearance and encourage additional blooms. Taller plants may benefit from support in windy locations.

Flowering/Maturity: Under favorable conditions, flowering generally begins within about two to three months after sowing and can continue through much of the warm season.