Eden Brothers
Cosmos Seeds Rosetta
Best low-maintenance annual for gardeners wanting vibrant, pollinator-friendly cut flowers.
Cosmos bipinnatus 'Rosetta' seeds produce stunning daisy-like flowers with unique, streaked petals in shades of pink, white, and magenta, all centered around a golden yellow heart. These easy-to-grow annuals reach up to three feet tall and provide prolific blooms from summer through fall, especially when cut. They thrive in full sun and are known to attract beneficial pollinators like bees and butterflies, making them a delightful addition to any garden, container, or as a cut flower.
$7.49
Owner Satisfaction
4.7
/ 5
Category Rank
270
/ 5880
#270 in Seeds & Seed Tape
Price vs Category Average
-29%
Below average
Plant Height
36
/ inches
Who it's for
- Floral enthusiasts wanting reliable stems for indoor arrangements
- Gardeners seeking sophisticated, standout floral colors
- Busy gardeners needing low-maintenance, drought-hardy plants
Who should skip it
- Gardeners wanting low-maintenance plants without support structures
- Minimalists who prefer to avoid unwanted volunteer seedlings
- Gardeners who prefer plants that do not require pest management
Performance breakdown
Pollinator Attraction
High-nectar blooms serve as a magnet for local bees and butterflies.
Ease of Cultivation
Low-maintenance annuals that thrive with minimal intervention from novice gardeners.
Bloom Prolificacy
Frequent cutting encourages a steady stream of flowers throughout the season.
Environmental Adaptability
Wide hardiness range ensures success across most North American climate zones.
Visual Impact
Unique streaked petal patterns offer a sophisticated aesthetic for cut arrangements.
Drought Tolerance
Established plants handle dry spells well, reducing the need for irrigation.
Key Specs
Plant Height
36 inches
Seed Spacing
12 inches
Hardiness Zones
2 through 10
Days to Maturity
75 to 90 days
Coverage (Packet)
Up to 80 Sq. Ft
Planting Depth
1/4 inch
Sunlight Exposure
Full Sun
Water Requirements
Low
Features
- Prolific flowering, increases with cutting
- Deer resistant blooms
- Extended bloom time through fall
- Attracts bees, butterflies, and hummingbirds
- Easy to grow annual
- Unique streaked flower patterns
- Thrives in full sun
- Open-pollinated seeds
What customers say
Rosetta Cosmos seeds are celebrated for their exceptional quality and reliable performance. Gardeners consistently report high germination rates, resulting in strong, healthy plants. The ease of cultivation makes them a superb option for all skill levels. The blooms are frequently described as stunning and accurately represent the advertised unique colors, offering significant aesthetic appeal. These seeds provide a straightforward planting experience and dependable results, making them a valuable choice for creating beautiful gardens.
Know before you buy
Cosmos 'Rosetta' grows to a height of approximately 36 inches. Because of their height, they work well as a backdrop in flower beds or as a structural element in containers.
While not strictly required, cutting the flowers regularly actually encourages the plant to produce more blooms. The more you cut for bouquets, the more prolific the plant becomes throughout the summer and fall.
Yes, these are container-friendly. Ensure your pot is large enough to accommodate a plant that reaches three feet tall and provides adequate drainage.
Yes, the Rosetta variety is considered deer resistant. This makes them a great choice for gardens that are frequently visited by deer or other grazing animals.
These cosmos thrive in full sun and have low water requirements once established. They are quite hardy and perform well in a variety of climates across zones 2 through 10.
You can expect to see blooms within 75 to 90 days after planting. Once they begin flowering, they will continue to provide color through the fall.
Still have a question?
Ask Hayley anything about this product before you decide.