Rubenza Cosmos
Cosmos bipinnatus
Conventionally Grown
A productive, upright cosmos whose cranberry-red flowers mellow to antique rose and amber, lending richly varied color to borders and bouquets.
Bring a dynamic, shifting color palette to your flower borders with this uniquely beautiful cosmos. Unlike the static colors of standard varieties, 'Rubenza' puts on a living show: solitary blooms open as a deep, velvety wine-red and gradually soften into shades of antique rose, terracotta, and amber as they mature. Set against delicate, ferny foliage and highlighted by bright golden centers, these flowers create a rich, multi-hued tapestry that looks wonderful in the garden and even better in a vase.
Practical gardeners will love this variety's robust habit. Growing to a manageable height of about three feet, it remains upright without the need for staking, even in exposed or windy borders. It blooms early and keeps producing right up until frost, especially if you harvest stems frequently for bouquets. It is a buzzing hub for bees and butterflies all summer long, and if you let the last blooms turn to seed, the plants become a natural feeder for finches.
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Growing instructions
Product Details
| Days to Maturity | 75-90 days |
|---|---|
| Days to Germination | 7-10 days |
| Width at Maturity | 12" |
| Height at Maturity | 36-48" |
| Hardiness Zone Range | Annual |
| Sun Conditions | Partial Sun (4-6 hours Sun), Full Sun (8+ Hours Sun) |
| Planting Depth | ¼" |
| Row Spacing | 12" |
| Plant Spacing | 12" |
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Rubenza Cosmos
- Regular price
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$6.39 - Regular price
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- Sale price
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$6.39

