How to Grow and Care for Sulfur cosmos

Sulfur cosmos, also known as Sulphur cosmos, Orange cosmos, Yellow cosmos, Klondike cosmos, Golden cosmos, Cosmic orange

Sulfur cosmos thrives in warm climates, preferring full sun exposure for best growth. Notably tolerant of poor soil conditions, sulfur cosmos requires minimal additional fertilization. Watering should be moderate, as sulfur cosmos is drought-resistant and too much water can lead to root rot. Deadheading spent blooms can encourage further flowering.

Watering schedule: Twice per week

Sunlight Requirements: Full sun

In This Article

Planting and Growing Sulfur cosmos

Toughness	High
Care Level	Medium
Care Difficulty	Easy
Lifespan	Annual
Watering Schedule	Twice per week
Sunlight Requirements	Full sun
Soil Type	Garden Soil
Soil pH	6-7.5
Planting Time	Spring
Hardiness Zones	3-9

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Varieties of Sulfur cosmos

Sulfur cosmos 'Bright Lights'

Add a pop of sunshine to your garden with sulfur cosmos 'Bright Lights'. These stunning flowers are drought-tolerant and attract pollinators, making them a great addition to any ecosystem. Did you know? The genus name 'Cosmos' comes from the Greek word for 'order' and refers to the regular arrangement of petals in the flower heads.

Sulfur cosmos 'Cosmic Red'

Sulfur cosmos 'Cosmic Red' is a Cosmos cultivar that was bred to create specific orange-red petals similar to poppies. The blooms appear in summer and produce twice the amount of flowers than other cosmos. Gardeners often use this plant in their yard to add a pop of color and to attract pollinators.

Sulfur cosmos 'Cosmic Yellow'

Sulfur cosmos 'Cosmic Yellow' is a cultivar of the Cosmos plant. This cultivar produces bright, sunshine blooms and works well in gardens to attract pollinators as well as in a vase as cut flowers. Named for the vibrancy of its flowers, gardeners like this variety as it is particularly long-blooming.

Sulfur cosmos 'Cosmic Orange'

Sulfur cosmos 'Cosmic Orange' is a vibrant, sun-loving annual with fiery orange, daisy-like flowers that adorn its ferny, green foliage. Thriving in warm climates, sulfur cosmos 'Cosmic Orange' reaches up to 2 feet tall and attracts pollinators, such as butterflies, enhancing garden biodiversity. Its hardy nature allows it to flourish in a variety of soils, with full sun exposure encouraging abundant blooms.

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More General Info About Sulfur cosmos

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Sulfur cosmos is an annual flowering plant reaching heights up to 6 feet (183 cm). This species boasts a vivid display of double and semi-double blooms measuring 1-2 inches (2.5-5 cm) across, in hues of bright orange, red, and yellow. The flowers are borne atop well-branched stems and are characterized by their dimorphic involucral bracts arranged in two distinct rows, which encase the small floral heads. Its leaves are pinnatifid and arranged oppositely along the stems, providing a lush backdrop to the strikingly colorful blooms from summer through to the first frost.