• White Cosmos flowers blooming in a sunny cottage garden
  • White Cosmos flowers blooming in a garden
  • White Cosmos flowers blooming in a sunny cottage garden
  • White Cosmos flowers blooming in a sunny cottage garden
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EdenValleySeeds

White Cosmos Flower Seeds for Planting – Beautiful Long-Blooming Garden Flowers

White Cosmos Flower Seeds for Planting – Beautiful Long-Blooming Garden Flowers

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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 elegant white, daisy-like flowers with delicate golden centers.

  • Cosmos bipinnatus is a graceful annual with airy foliage and branching stems.

  • Ideal for flower beds, borders, cottage gardens, containers, and cutting gardens.

  • Attracts bees, butterflies, and other beneficial pollinators to sunny garden spaces.

  • Long flowering season provides fresh garden color throughout the warm months.

Growing Benefits

  • Adds a clean, bright look to summer flower gardens.

  • Easy to grow from seed, making it suitable for beginner gardeners.

  • Excellent choice for cut-flower arrangements and informal bouquets.

  • Thrives in sunny locations with well-drained soil.

  • Provides seasonal habitat and nectar opportunities for pollinating insects.

Seed Specifications

  • Common Name: White Cosmos

  • Botanical Name: Cosmos bipinnatus

  • Plant Type: Annual flowering plant

  • Colors: White flowers with yellow centers

  • Height: About two to five feet

  • Sunlight: Full sun

  • Soil: Well-drained, moderately fertile soil

  • Water: Moderate; keep evenly moist during establishment

  • Germination Time: About seven to twenty-one days

  • Sowing Depth: About one-quarter inch deep

  • Spacing: About twelve to eighteen inches apart

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

  • Flowering/Maturity: Usually flowers about two to three months after sowing

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

Growing Tips

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

  • Select a location with full sunlight and good drainage.

  • Avoid overfertilizing, as overly rich soil can encourage foliage rather than flowers.

  • Remove faded blooms regularly to encourage continued flowering and maintain a tidy appearance.

Seed Storage

Store unused seeds in a sealed packet or airtight container in a cool, dry, dark location. Keep them away from humidity, heat, and direct sunlight to help preserve seed quality.

Unique Facts About Seeds

  • White cosmos is a member of the Asteraceae family, which includes daisies and sunflowers.

  • Cosmos bipinnatus is native to Mexico and parts of Central America.

  • Cosmos flowers have a distinctive daisy-like form with a central cluster of tiny florets.

  • The finely divided foliage gives cosmos plants a light, feathery appearance.

Growing Instructions

Planting Season: Sow directly outdoors after the last frost when the soil has warmed. In suitable climates, planting can continue through the warm growing season.

Sowing: Prepare loose, well-drained soil in a sunny location. Scatter or place the seeds on the soil surface and cover them lightly.

Depth: Plant seeds approximately one-quarter inch deep. Avoid covering them with a thick layer of soil.

Spacing: Thin young seedlings to approximately twelve to eighteen inches apart to provide adequate room for mature plants.

Sunlight: Choose a location receiving full sun. Plenty of direct sunlight supports strong growth and abundant flowering.

Soil: Cosmos performs well in average, well-drained soil. Extremely rich soil may encourage excessive foliage growth.

Watering: Keep soil lightly and evenly moist during germination and early growth. Once established, water when the soil begins to dry.

Germination: Seeds generally germinate within about seven to twenty-one days under favorable temperature and moisture conditions.

Transplanting: Direct sowing is recommended because cosmos can develop a sensitive root system. If transplanting is necessary, move young seedlings carefully.

Fertilizing: Fertilize lightly if needed. Avoid excessive nitrogen, which can produce lush foliage at the expense of flowers.

Care: Remove weeds around young plants and deadhead spent flowers regularly. Taller plants may benefit from staking or support in exposed locations.

Flowering/Maturity: Flowers generally begin appearing about two to three months after sowing and can continue throughout much of the warm season when growing conditions are favorable.