Sweet Coneflower (Rudbeckia subtomentosa)

Sweet Coneflower

This clumping perennial, the sweet Coneflower or _LATIN_NAME, features yellow, daisy-like flowers with dark brown centers. This hardy flower has a sweet scent and is deer resistant. The gorgeous yellow blooms are especially striking when grown in mass plantings.

Scientific classification

Species

Sweet Coneflower (Rudbeckia subtomentosa)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

Herb

Plant Type

Green

Leaf Color

2.5 cm to 8 cm

Flower Size

Yellow

Flower Color

Green, Yellow

Stem Color

Evergreen, Deciduous

Leaf type

5 - 35 ℃

Ideal Temperature

Summer, Fall

Growth Season

Moderate

Growth Rate

Images of Sweet Coneflower

Cultivars

There are several recognized cultivars of Sweet Coneflower, including the following common varieties :

Sweet coneflower 'Henry Eilers'Sweet coneflower 'Little Henry'

Quickly Identify Sweet Coneflower

Upright growth reaching 3-5 feet (0.9-1.5 meters), lanceolate leaves, bright yellow daisy-like flowers with raised central cone.

Grey-green leaves with toothed lower edges, downy underside, and coarser texture, along with smaller smooth-edged upper leaves.

Bright yellow flowers with purple central disk, 2-3 inches (5-7.5 cm) in diameter, fragrant when crushed.

Seed head containing dark, angular seeds without tuft of hairs, aiding in plant identification and propagation.

Light green stem with spreading hairs, terete (cylindrical), moderately thick (1/8 to 1/4 inch or 3-6 mm in diameter).

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Care Guide for Sweet Coneflower

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Sweet Coneflower thrives in moist meadows and light woodlands, preferring consistent hydration but tolerating short droughts due to a robust root system. Weekly watering promotes vitality. Mulching outdoors aids moisture retention, reducing watering frequency while supporting lush foliage and vibrant blooms.

Fertilize: Fertilize sweet Coneflower monthly with balanced and high-phosphorus fertilizers during the growing season. Monitor quantities to avoid over-fertilization. Adjust fertilization based on seasonal growth stages, and conduct a soil test prior to application for tailored nutrient fulfillment.

Pruning: Sweet Coneflower is a perennial that produces vibrant yellow blooms and thrives with annual pruning during late winter to early spring. Cutting back spent stems and overcrowded foliage promotes new growth, improves air circulation, and maintains shape, enhancing flowering and reducing disease risk.

Propagation: Sweet Coneflower is best propagated through division, preserving its vigor. Gardeners should split clumps at the root ball, ensuring each section includes healthy roots and shoots. This method supports a smooth transition to new locations, with sufficient soil moisture and light promoting strong growth.

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Images of Sweet Coneflower

Cultivars

Quickly Identify Sweet Coneflower

Care Guide for Sweet Coneflower

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Common Pests & Diseases