Rudbeckia hybrida 'Treasure Trove' – 'Treasure Trove' Coneflower

Brighten your landscape with this spectacular perennial that produces an abundance of large, golden-yellow blooms centered with dark brown cones from midsummer straight through autumn. Its robust, well-branched habit supports a massive, continuous flower show, while its sturdy foliage maintains a clean look all season long thanks to superior resistance to foliar diseases.

• Foliage: Large, dark green, textured, deciduous leaves forming a dense, vigorous clump.
• Flowering / Stems: Giant golden-yellow daisy-like flowers with rich chocolate-brown center cones, held upright on sturdy, well-branched stems.
• Light: Full sun to partial shade (achieves peak flowering density in full sun).
• Habit: Upright, bushy, and sturdy.
• Growth: Fast-growing, reaching 80 to 95 cm in height with a spread of 90 to 105 cm.
• Soil: Moist, well-drained, moderately fertile soil.
• Temperature: Hardy to Canadian zone 4.
• Resistances: Excellent resistance to Septoria leaf spot; strong tolerance to summer heat, transient drought, and white-tailed deer.

• Types of use: Ideal for sunny mass plantings, mixed perennial borders, cottage gardens, and large patio containers.
• Decorative advantages: Creates an eye-catching, long-lasting golden display, attracts pollinators, and provides outstanding cut flowers for seasonal floral arrangements. Seed cones left intact for winter add visual structure and feed songbirds.

• Watering: Water regularly during the first growing season to establish a deep root system. Once established, allow the top layer of soil to dry out between waterings.
• Fertilization: Apply a balanced slow-release granular fertilizer or top-dress with organic compost in early spring. Avoid excessive nitrogen to maintain rigid stems.
• Taille: Deadhead spent flowers regularly to encourage continuous blooming. Cut all stems back to ground level in late autumn or early spring.
• Planting: Plant in spring or early autumn, spacing individual plants 90 to 105 cm apart in compost-enriched soil.