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Cosmos – Sulphur Bright Lights Mix

Price range: $2.50 through $27.75

The Sulphur Bright Lights Mix is a vibrant blend of Cosmos sulphureus varieties, showcasing bright yellows, oranges, and fiery reds. These cosmos thrive in hot, arid climates and are native to Central America, where they are well adapted to withstand temperatures exceeding 100°F (38°C).

Compared to Cosmos bipinnatus, Cosmos sulphureus produces smaller, more compact flowers and typically blooms later in the growing season. In dry, warm regions, this variety can even be planted in the fall, extending the blooming period. In colder or wetter climates, sow seeds only in the spring after the soil has sufficiently warmed, as these seeds require heat for germination and may rot if planted too early in cold, moist soil.

Like all cosmos, Sulphur Bright Lights attract birds and pollinators such as bees and butterflies, making them a beneficial addition to any garden ecosystem. They also make excellent cut flowers, providing vivid color and long-lasting blooms.

These cosmos prefer well-drained, moderately infertile soil; overly rich or heavily fertilized soil can cause excessive growth, leading to tall, unstable plants prone to falling over. They are low-maintenance, drought-tolerant, and can sustain themselves even with minimal care. While they can be started indoors, direct sowing outdoors is often more successful.

Ideal for sunny gardens, wildflower meadows, and containers, the Sulphur Bright Lights Mix adds a burst of warm, fiery color and resilience to your planting scheme.

**For larger quantities than listed for sale please contact us for availability and pricing.

The broadcast rate for seeding is 70 – 87.5 pounds per acre.

The seed drill rate for seeding in rows is 35 pounds per acre.

Purchasing Options PriceQuantity
Small Packet $2.50

Covers approximately 5 square feet.

10 Gram $3.00

Covers approximately:
11 square feet. (Broadcast rate)
27 square feet. (Seed drill rate)

1/4 Pound $12.00

Covers approximately:
125 square feet. (Broadcast rate)
310 square feet. (Seed drill rate)

1 Pound $27.75

Covers approximately:
500 square feet. (Broadcast rate)
1,245 square feet. (Seed drill rate)

Scientific Name

Cosmos sulphureus

Product Type

Flower, Flower Mix

Color

Orange, Red, Yellow

Cycle

Annual

Origin

Introduced species

Height

24-48"

Germination Time

7-21 days

Planting Season

Spring

Bloom Season

Spring, Fall

Weeks to Bloom

9 to 10 weeks

Minimum Weeks to Bloom

9 Weeks to Bloom Minimum, 10 Weeks to Bloom Minimum

Maximum Weeks to Bloom

9 Weeks to Bloom Maximum, 10 Weeks to Bloom Maximum

USDA Zone

3 to 10

Seeds Per Pound

63,000

Seeding Rate (lb./acre)

35

Pollen/Nectar

Nectar, Pollen

Pollinator(s)

Bats, Birds, Butterflies, Honey Bees, Native Bees

Notes

The Cosmos sulphureus has a smaller flower than the Cosmos bippinatus

Light Requirement

Full Sun

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