Description
Deep Ruby-Red Cosmos with a Velvety, Jewel-Toned Glow
If you've ever wished cosmos came in a richer, more dramatic color, 'Rubenza' is the answer. This exceptional variety produces large, deeply saturated ruby-red blooms that deepen to a warm, velvety crimson at the center — a color so rich and luminous it practically glows in the garden. Against the feathery, fine-textured foliage that cosmos is known for, 'Rubenza' creates a striking, jewel-toned display that's equally stunning in the border and in the vase. Botanical Interests brings you this standout variety in a non-GMO, open-pollinated form.
Cosmos (Cosmos bipinnatus) 'Rubenza' is an award-winning variety celebrated for its unusually deep, saturated color — a significant departure from the typical pink and white cosmos palette. Its large blooms on long, sturdy stems make it one of the finest cosmos varieties for cut flower use, while its airy habit and continuous blooming make it a garden workhorse from midsummer through frost.
Why You'll Love It
- Stunning ruby-red color — deeply saturated, jewel-toned crimson blooms that stand out dramatically in the garden and in arrangements
- Award-winning variety — recognized for its exceptional color and garden performance
- Exceptional cut flower — large blooms on long, sturdy stems with excellent vase life
- Incredibly easy to grow — direct sow, minimal care; thrives in poor soil and blooms better with less fertilizer
- Long blooming season — continuous flowers from midsummer through the first hard frost
- Pollinator magnet — butterflies and bees are irresistibly drawn to the rich blooms throughout the season
- Non-GMO & open-pollinated — save seeds year after year
Growing Tips
Direct sow outdoors after the last frost in a full-sun location — cosmos thrives when direct sown and dislikes transplanting. Sow seeds ¼ inch deep and thin to 12–18 inches apart. Cosmos prefers lean, well-drained soil — rich or heavily fertilized soil promotes foliage over flowers. Water until established, then water sparingly; cosmos is drought-tolerant once growing. Deadhead regularly to encourage continuous blooming, or allow some flowers to go to seed for self-sowing. Succession sow every 3–4 weeks for a continuous supply of cut flowers through the season.
Packaged by Botanical Interests — a trusted name in heirloom and open-pollinated seeds since 1995.
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