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Asteraceae
Edible flowers
Sulfur Cosmos
Sulphur Cosmos produces an abundance of hot yellow, orange, or red-orange flowers from mid-summer until fall. Perfect for beds, country bouquets, and pollinator gardens.
Hardiness
Not hardy
Difficulty level
Easy
Discover the plant
Family
Asteraceae
Sulfur cosmos is a very free-flowering annual plant, prized for its bright flowers in warm shades of yellow, orange, and reddish-orange. Its finely cut foliage brings a light and airy texture to flowerbeds, borders, ornamental vegetable gardens, and country-style designs. With its abundant bloom and natural appearance, it's perfect for adding color, movement, and a summery ambiance to the garden.
Easy to grow, sulfur cosmos prefers a full sun location in light, well-drained, and not-too-rich soil. It tolerates heat and drier periods well once established, making it an excellent annual for low-maintenance gardens. Regular deadheading helps extend flowering and keep the plant more compact, but it can also be left more natural to encourage a wildflower meadow effect.
Highly appreciated by bees, butterflies, and other pollinators, sulfur cosmos helps create a lively and biodiverse garden. Its colorful flowers can also be used as cut flowers to create simple and bright bouquets. It's an ideal plant for gardeners looking for a tough, generous, and vibrant annual that can quickly beautify sunny spaces throughout the season.
Planting guide
From plantingto establishment.
Propagation
No-till drilling
Soil and care
The rightconditions.
Soil pH
Neutral to slightly alkaline
Fertilization
Light compost for sowing; avoid excess nitrogen, which promotes foliage growth
Care level
Easy
Seasonal care
Deadhead to prolong flowering; stake as needed in windy locations; pull out after frost
Container growing
A controlledenvironment.
Potted culture possible in a well-drained container
Bloom and dimensions
The completeprofile.
Bloom periodSummer to Fall
Flower colorYellow, orange to reddish-orange
Foliage colorFinely cut green
Foliage typeObsolete
FruitingDecorative seed heads at the end of the season
Maximum height24 to 48 inches (60 to 120 cm)
Maximum width30 to 45 cm (12 to 18 inches)
Growth rateRapid growth
Hardiness zoneNot hardy
Minimum temperature32 °F
Garden associations
What to plantwith it.
Annual bedding, wildflower meadow, cut flowers, pollinator garden, sunny border
Its strengths, naturally.
Safe for pets
Pets
Plants that attract butterflies
Butterflies
