Cosmos (Radiance) Plant
Cosmos Radiance is a stunning annual variety of Cosmos bipinnatus, known for its large, daisy-like flowers in deep crimson with a contrasting white base, blooming prolifically from summer to fall. These 3" potted starters are ideal for adding vibrant color to beds, borders, or containers, thriving in full sun with minimal care, attracting pollinators like butterflies and bees for a lively garden display.
Plant Specifications and Attributes
- Plant Size: 3-4 feet tall, with a spread of 1-3 feet.
- Spacing: Plant 9-12 inches apart for dense growth or up to 18 inches for more airflow.
- Sun Exposure: Full sun (at least 6-8 hours of direct sunlight per day); partial shade tolerated but may reduce blooms.
- Hardiness Zone: Annual; suitable for USDA zones 2-11.
- Bloom Period: Summer through fall, until first frost.
Description
Cosmos Radiance features elegant, fern-like foliage and bold, 3-4 inch daisy-shaped blooms in rich crimson petals with a white picotee edge, creating a striking two-tone effect. This heat-tolerant annual is perfect for cut flower arrangements, as the long stems hold up well in vases. It self-seeds readily in suitable climates, ensuring future displays, and requires low fertility soil to avoid excessive foliage over flowers.
Transplanting Instructions
Transplant after the last frost date in your area (typically late spring). Choose a sunny spot with well-drained, average to poor soil. Dig a hole slightly larger than the 3" pot, gently remove the plant, and place it at the same depth it was growing. Space plants 9-12 inches apart. Water thoroughly after planting to settle the soil, then water moderately as established plants are drought-tolerant. Avoid over-fertilizing to promote more blooms. Pinch back young plants to encourage bushiness if desired.