Cosmos 'Rubenza'
Cosmos bipinnatus
This variety is absolutely stunning, starting out a moody, velvety crimson and aging to an antique rose color. It's also prolific and blooms for weeks if harvested regularly. I'm totally obsessed and found myself constantly snipping it for design. I adore cosmos, but not all are created equal when it comes to cut flowers. The varieties we've selected are my top favorites.
Wildly popular in floral design, stunning in the garden, beloved by the pollinators: Cosmos are easy to grow and incredibly prolific. Trust us: You garden will thank you.
Packet contains approximately 50 seeds.
DETAILS
Plant type: Annual
Days to maturity: 75–90 days
Light preference: Full sun
Plant spacing: 9–12 inches
Plant height: 36-48 inches
Hybrid status: Open pollinated
SOWING
Depth: Cover lightly
Days to germination: 7–10 days at 68–72°F
How to Grow
Sow indoors 5–7 weeks before transplanting out. Cover lightly. Cosmos may also be direct seeded once soil temperature is above 60°F. Pinching encourages branching. Wider plant spacing creates stronger, thicker stems.
Harvest & Vase Life
Harvest when petals are just opening, but not yet flattened. Deadheading prolongs bloom period. Expected vase life: 5–7 days.
SHIPPING
FREE: $100 or more on any seeds
$3.95: 1–9 seed packets
$7.95: 10+ seed packets
Photos: Petal Back Farm and Johnny's Selected Seeds
