Rubenza Cosmos Seeds

5 out of 5 stars
(2 reviews)
Availability: In Stock

Deeply colored 3" blooms are beauteous in contrast when paired with white flowers and silver-foliage plants. A Fleuroselect Novelty award winner, this cosmos is a real standout in the garden or a vase, and butterflies love them, too. Blooms start out red-wine colored and turn to dusky rose as they age. Growing cosmos is an easy way to add color to your garden, as they require little attention and are drought tolerant.

$2.69 300 mg (~29 seeds)

Botanical Name: Cosmos bipinnatus

Family: Asteraceae

Native: Mexico and Arizona

Hardiness: Annual

Plant Dimensions: 24"–32" tall, about 28" wide

Variety Information: Flowers up to 3" start out deep wine-red, turning to rose as they age.

Exposure: Full sun

Bloom Period: Summer to frost

Attributes: Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Drought Tolerant

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F.

When to Start Inside: 4 to 6 weeks before your average last frost date.

Days to Emerge: 5–10 Days

Seed Depth: Barely cover

Seed Spacing: A group of 3 seeds every 12"

Thinning: When 1"–2" tall, thin to 1 every 12"

Write a Review

Rubenza Cosmos Seeds Reviews

2 reviews

Rubenza Cosmos

5 out of 5 stars Jun 11, 2021
These are easy to grow and get a lot of compliments from people walking by.
Robert from CA


5 out of 5 stars Aug 2, 2021
These are a beautiful deep, rich color when they first open, and fade gradually to an equally lovely color. The foliage is lacy and airy, and they find their way through my mixed border to the sun, blooming along the way. Cosmos are host plants to some insects that eat leaf miners, which my roses have a bit. Next year I plan to sprinkle these thickly under the roses and let them keep self seeding, along with alyssum.
Linda from OR

You May Also Like

This website uses cookies to ensure you receive the best experience. Learn More