• Photo of Rudbeckia subtomentosa (Rudbeckia subtomentosas)

Plant Profile: Rudbeckia subtomentosa

Taxonomy: Rudbeckia subtomentosa

Names

Sweet Coneflower

  • Photo of Rudbeckia subtomentosa (Rudbeckia subtomentosas)

Phonetic Spelling:rud-BEK-ee-a sub-toh-men-TOH-suh

Genus:Rudbeckia

Species:subtomentosa

Family:Asteraceae (daisy)

Rudbeckia subtomentosa, commonly known as Sweet Coneflower, is a perennial herb belonging to the daisy family. This plant thrives in well-drained loam or sandy loam with medium moisture levels and can flourish in full or partial sunlight. Sweet Coneflower is quite resilient, capable of withstanding hot, humid summers, occasional drought, and clay soil, while also being resistant to deer. It benefits from good air circulation, and to promote further blooming, it’s advisable to remove spent flowers. Additionally, the tall stems may need some support, particularly if the plant is situated in shady conditions or receives excessive water or fertilizer. This species is an excellent option for rain gardens, borders, cottage gardens, and naturalized landscapes. Sweet Coneflower typically reaches heights of 3 to 5 feet and showcases daisy-like yellow flowers, approximately 3 inches in diameter, featuring dark brownish-purple centers on branched stems. The flowers emit a subtle anise fragrance, which contributes to its common name.

**Diseases, Insects, and Other Plant Issues:**
There are no significant insect or disease threats associated with this plant. However, powdery mildew may occasionally occur, and taller specimens might require support, especially when grown in partial shade.

Rudbeckia subtomentosa Feature Summary

Rudbeckia subtomentosa Image Gallery

Tags

#rain garden
#drought tolerant
#wildlife plant
#native perennial
#cottage garden
#cpp
#deer resistant
#naturalizes
#borders
#wildflower garden
#larval host plant
#butterfly friendly
#pollinator garden
#wavy-lined emerald butterfly
#silvery checkerspot butterfly

Similar Plants

Rudbeckia subtomentosa Feature Summary

Attributes
central United States
This is a larval host plant for Silvery Checkerspot (Chlosyne nycteis) caterpillars which have one brood in the north and two broods from May-September in the rest of its range. The adults feed on nectar from red clover, common milkweed, and dogbane. Bees and other polinators are attracted by the pollen and nectar of the flowers. Caterpillars of various butterfly species also feed on the plant. This plant also supports Wavy-lined Emerald (Synchlora aerata) larvae.
Perennial
Flowers
Yellow rays and brownish purple center disks. The central disks of the flowerheads are fragrant after being crushed.
Gold/Yellow
Fragrant
Good Cut
Long Bloom Season
7 - 20 petals/rays
1-3 inches
Leaves
Grey green leaves, toothed, downy on the bottom.
Lanceolate
Lobed
Dentate
> 6 inches
3-6 inches
Stem
Light green, terete, and sometimes slightly furrowed; they are covered with spreading hairs
Hairy (pubescent)
Whole Plant Traits
Perennial
Native Plant
Wildflower
Coarse
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Good Drainage
Coastal
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
8b
8a
Clay
High Organic Matter
Loam (Silt)
Sand
Landscape
Butterfly Garden
Pollinator Garden
Rain Garden
Cottage Garden
Drought
Deer
Poor Soil
Meadow
Naturalized Area
Butterflies
Pollinators
Bees

Rudbeckia subtomentosa Attributes

Rudbeckia subtomentosa: Country Or Region Of Origin

central United States

Rudbeckia subtomentosa: Wildlife Value

This is a larval host plant for Silvery Checkerspot (Chlosyne nycteis) caterpillars which have one brood in the north and two broods from May-September in the rest of its range. The adults feed on nectar from red clover, common milkweed, and dogbane. Bees and other polinators are attracted by the pollen and nectar of the flowers. Caterpillars of various butterfly species also feed on the plant. This plant also supports Wavy-lined Emerald (Synchlora aerata) larvae.

Rudbeckia subtomentosa: Particularly Resistant To (Insects/Diseases/Other Problems)

Moderately deer resistant.

Rudbeckia subtomentosa: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Rudbeckia subtomentosa: Recommended Propagation Strategy

Division
Grafting
Layering
Leaf Cutting
Root Cutting
Seed
Stem Cutting

Rudbeckia subtomentosa Flowers

Rudbeckia subtomentosa: Flower Description

Yellow rays and brownish purple center disks. The central disks of the flowerheads are fragrant after being crushed.

Rudbeckia subtomentosa: Flower Color

filter_vintage
Gold/Yellow

Rudbeckia subtomentosa: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Rudbeckia subtomentosa: Flower Bloom Time

Winter
Spring
Summer
Fall

Rudbeckia subtomentosa: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Rudbeckia subtomentosa: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Rudbeckia subtomentosa Leaves

Rudbeckia subtomentosa: Leaf Description

Grey green leaves, toothed, downy on the bottom.

Rudbeckia subtomentosa: Leaf Color

spa
Green

Rudbeckia subtomentosa: Leaf Shape

Acicular
Auriculate
Cordate
Cuneate
Deltoid
Elliptical
Filiform
Lanceolate
Linear
Oblanceolate
Oblong
Obovate
Obtuse
Orbicular
Ovate
Palmasect
Palmatifid
Peltate
Pinnatifid
Pinnatisect
Reniform
Rhomboidal
Spatulate
Subcordate
Subulate

Rudbeckia subtomentosa: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Rudbeckia subtomentosa: Hairs Present

No
Yes

Rudbeckia subtomentosa: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Rudbeckia subtomentosa: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Rudbeckia subtomentosa: Leaf Width

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Rudbeckia subtomentosa Stem

Rudbeckia subtomentosa: Stem Description

Light green, terete, and sometimes slightly furrowed; they are covered with spreading hairs

Rudbeckia subtomentosa: Stem Color

grass
Green

Rudbeckia subtomentosa: Stem Is Aromatic

No
Yes

Rudbeckia subtomentosa: Stem Surface

Corky Ridges
Covered with a powdery bloom (glaucous)
Dull
Hairy (pubescent)
Polished
Smooth (glabrous)

Rudbeckia subtomentosa Whole Plant Traits

Rudbeckia subtomentosa: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Rudbeckia subtomentosa: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Rudbeckia subtomentosa: Growth Rate

Slow
Medium
Rapid

Rudbeckia subtomentosa: Maintenance

Low
Medium
High

Rudbeckia subtomentosa: Texture

Fine
Medium
Coarse

Rudbeckia subtomentosa Cultural Conditions

Rudbeckia subtomentosa: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Rudbeckia subtomentosa: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Rudbeckia subtomentosa: NC Region

Coastal
Mountains
Piedmont

Rudbeckia subtomentosa: USDA Plant Hardiness Zone

thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b

Rudbeckia subtomentosa: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Rudbeckia subtomentosa Landscape

Rudbeckia subtomentosa: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Rudbeckia subtomentosa: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Rudbeckia subtomentosa: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Rudbeckia subtomentosa: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees