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2017 crop Colorado

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Growing Info

Scarification: none required

Stratification: none required

Germination: sow seed 1/16" deep, tamp the soil, lightly mulch the seed bed.

Native to: Mexico

Native

Introduced

Cosmos sulphureusCosmos sulphureus

Sulphur Cosmos, Yellow Cosmos

In Stock: 0.523 lb (Total:0.523lb)

Cosmos sulphureus

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0.52 lb CO

Details

Germination:

91%

Germination test:

Actual

Purity:

99%

Seeds per lb:

58,753

Quantity:

0.52 lb

Collected in:

Colorado

Crop year:

2017

Min. hardiness zone:

Item ID:

1825234

Characteristics

Growing Info

Scarification: none required

Stratification: none required

Germination: sow seed 1/16" deep, tamp the soil, lightly mulch the seed bed.

Native to: Mexico

Native

Introduced

Cosmos sulphureus, commonly known as Sulphur Cosmos, is an enchanting addition to any garden, offering vibrant hues of golden-yellow and orange throughout the summer until the first frost. As a fast-growing annual in the Asteraceae family, this plant can range from compact, well-branched forms reaching 12 to 18 inches tall, perfect for adding bright colors to your garden beds, borders, or even as background plantings.

Plant Sulphur Cosmos in a sunny spot with dry to medium, well-drained soil for optimal growth. It thrives in zones 2 to 11 and can withstand poorer soils without compromising on its abundant, showy blooms. Post-frost, sow seeds outdoors; ensure they’re not buried too deep, as this can prevent germination. With minimal maintenance, including occasional deadheading and potential staking in windy conditions, you’ll enjoy a continuous display of radiant flowers that beckon butterflies and hummingbirds.

When your spring-planted Cosmos shows abundant seed heads, a trim to 12-18 inches will reinvigorate its floral display—a natural way to enhance density and vibrancy as temperatures rise. Ideal for cottage and cutting gardens, or even wild, sunny meadows, Sulphur Cosmos promise lively, enduring beauty with their resilient, decorative blooms. Perfect for brightening summer gardens or creating striking cut flower arrangements, this versatile and easy-to-grow annual is bound to captivate both gardeners and pollinators alike.