• Vibrant yellow Sunshine Cosmos flowers blooming in a sunny garden
  • Cosmos Yellow Sunshine Seeds for planting
  • Vibrant yellow Sunshine Cosmos flowers blooming in a sunny garden
  • Vibrant yellow Sunshine Cosmos flowers blooming in a sunny garden
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EdenValleySeeds

Cosmos Yellow Sunshine Seeds for Planting – Bright Yellow Sulphur Cosmos Flowers

Cosmos Yellow Sunshine Seeds for Planting – Bright Yellow Sulphur Cosmos 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

  • Bright yellow cosmos blooms that bring cheerful color to sunny garden spaces.

  • Delicate, daisy-like flowers with finely divided, airy foliage.

  • Excellent for flower beds, borders, cottage gardens, containers, and cut-flower displays.

  • Attractive to bees, butterflies, and other garden pollinators.

  • Easy-care annual flower suited to beginner gardeners and warm-season planting.

Growing Benefits

  • Adds vibrant yellow color to summer landscapes.

  • Easy to grow directly from seed in suitable conditions.

  • Provides attractive flowers for home-cut bouquets.

  • Works well in mixed borders and informal cottage gardens.

  • Makes a colorful addition to pollinator-friendly planting areas.

Seed Specifications

  • Common Name: Yellow Cosmos

  • Botanical Name: Cosmos sulphureus

  • Plant Type: Annual flowering plant

  • Colors: Bright yellow

  • Height: About two to four feet

  • Sunlight: Full sun

  • Soil: Well-drained, moderately fertile soil

  • Water: Moderate; keep moist during establishment

  • 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: Usually begins flowering about two to three months after sowing

  • 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 that receives full sunlight for strong growth and flowering.

  • Avoid overfertilizing, particularly with high-nitrogen fertilizer.

  • Remove faded flowers regularly to encourage a longer display of blooms.

Seed Storage

Keep unused seeds in a sealed packet or airtight container. Store them in a cool, dry, dark location away from moisture, heat, and direct sunlight.

Unique Facts About Seeds

  • Yellow cosmos is commonly associated with Cosmos sulphureus, a species known for yellow and orange flowers.

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

  • Its finely divided foliage gives the plant a light, delicate appearance.

  • Yellow cosmos is well suited to sunny summer gardens and pollinator-friendly planting.


Growing Instructions
Planting Season: Sow outdoors after the last frost when the soil has warmed. Choose a warm period suitable for annual flower growth.
Sowing: Prepare a sunny area with loose, well-drained soil. Sow seeds over the prepared soil and cover them lightly.
Depth: Plant seeds approximately one-quarter inch deep. Avoid deep planting.
Spacing: Thin seedlings to approximately eight to twelve inches apart once they are established.
Sunlight: Grow in full sun for the best flowering performance.
Soil: Use well-drained soil with moderate fertility. Avoid poorly drained locations.
Watering: Keep the soil evenly moist during germination and early growth. Once established, water when the soil starts to dry.
Germination: Seeds typically germinate within about seven to fourteen days when moisture and temperature conditions are favorable.
Transplanting: Direct sowing is generally preferred. If transplanting is necessary, move young seedlings carefully to minimize root disturbance.
Fertilizing: Feed lightly if needed. Avoid excessive nitrogen, which may encourage foliage instead of flowers.
Care: Keep the planting area free of weeds while plants are young. Deadhead spent flowers to maintain a tidy appearance and encourage additional blooms. Provide support if taller plants become unstable.
Flowering/Maturity: Plants generally begin flowering about two to three months after sowing and can continue blooming through much of the warm growing season under favorable conditions.