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Rudbeckia hybrida 'Treasure Trove'

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

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

Format

Exposure

  • Sun
  • Partial shade

Rusticity

4, 5, 6, 7, 8, 9

Bloom time

  • July
  • August
  • September
  • October

  • Abundant long-lasting golden-yellow blooms
  • Superior foliar disease resistance
  • Natural magnet for friendly pollinators
  • Exceptional performance in cut bouquets
  • Outstanding resilience to summer heat

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.

Characteristics

  • 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.

Use

  • 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.

Maintenance

  • 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.

Plant details

Dimensions

Spacing
- 42 in.
Spread
36 - 42 in.
Height
32 - 38 in.

Characteristics

Habit:

  • Bushy
  • Upright

Flowering colours:

  • Yellow

Plant needs

Watering:

  • Tolerates dry and well-drained soil
  • Moderate

Maintenance:

  • Easy
  • Cut back in spring
  • Deadheading

Soil requirement:

  • Well-drained
  • Rich
  • Adaptable

Features

Resistance:

  • White-tailed deer
  • Heat
  • Cold
  • Disease
  • Drought

Attract:

  • Pollinators
  • Birds
  • Butterflies

Use:

  • Border
  • Mass planting
  • Flower bed
  • Container – thriller
  • Planter
  • In-ground

Attribute:

  • Cut flower
  • Long blooming
  • Native

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