Overview
Rudbeckia subtomentosa 'Henry Eilers' is a bushy, clump forming, columnar upright perennial in the genus Rudbeckia, part of the Asteraceae family, with deciduous foliage. Rudbeckia subtomentosa 'Henry Eilers' grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H5. Suggested uses include borders, wildflower gardens and naturalized areas. It is native to Illinois, Indiana, Kentucky, Texas, Missouri, North Carolina, New York and Arkansas.
About
Rudbeckia subtomentosa, the sweet coneflower, is a flowering plant in the family Asteraceae and is found in the central United States.
Wikipedia contributors, CC BY-SA 4.0 — Rudbeckia subtomentosa
About the genus
Rudbeckia is a plant genus in the Asteraceae or composite family. Rudbeckia flowers feature a prominent, raised central disc in black, brown shades of green, and in-between tones, giving rise to their familiar common names of coneflowers and black-eyed-susans. All are native to North America, and many species are cultivated in gardens for their showy yellow or gold flower heads that bloom in mid to late summer.
Wikipedia contributors, "Rudbeckia", CC BY-SA 4.0 — Rudbeckia
Growing conditions
Best soil and position for Rudbeckia
- Sunlight
- full sun, partial shade
- Soil type
- loamy, sandy, clay
- Soil pH
- neutral, slightly acidic, slightly alkaline
- Soil moisture
- moist, well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
Rudbeckia subtomentosa 'Henry Eilers' size, habit and characteristics
- Plant type
- perennial
- Habit
- Bushy, Clump forming, Columnar upright
- Foliage
- Deciduous
- Suggested uses
- borders, wildflower gardens, naturalized areas
- Native to
- Illinois, Indiana, Kentucky, Texas, Missouri, North Carolina, New York, Arkansas
Care notes
Pruning and caring for Rudbeckia subtomentosa 'Henry Eilers'
- Cultivation
- Prefers moist, well-drained soil; tolerates some drought once established; deadhead to prolong flowering
- Pruning
- Cut back in late autumn or early spring to encourage fresh growth
- Propagation
- division, seed
- Pest resistance
- Aphids, Slugs
- Disease resistance
- Powdery mildews
Frequently asked questions
How do I grow Rudbeckia subtomentosa 'Henry Eilers'?
Prefers moist, well-drained soil; tolerates some drought once established; deadhead to prolong flowering.
Where is the best place to plant Rudbeckia subtomentosa 'Henry Eilers'?
Rudbeckia subtomentosa 'Henry Eilers' prefers full sun and partial shade. It suits sheltered positions.
What soil does Rudbeckia subtomentosa 'Henry Eilers' need?
Rudbeckia subtomentosa 'Henry Eilers' is adaptable and grows happily in most soil types, including loamy, sandy and clay. It is happy in soil of any pH. Aim for soil that stays moist to well-drained.
How do I prune Rudbeckia subtomentosa 'Henry Eilers'?
Cut back in late autumn or early spring to encourage fresh growth.
Is Rudbeckia subtomentosa 'Henry Eilers' hardy in the UK?
Rudbeckia subtomentosa 'Henry Eilers' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Rudbeckia subtomentosa 'Henry Eilers'?
Division, seed.
More in the Rudbeckia genus
- Rudbeckia mollisSoft Rudbeckia
- Rudbeckia nitidashining coneflower
- Rudbeckia nitida 'Goldquelle'Black-Eyed Susan
- Rudbeckia nitida 'Herbstsonne'
- Rudbeckia Summerdaisy's Bronze Bicolor
- Rudbeckia sub. 'Henry Eilers'Black-eyed Susan
- Rudbeckia sub. 'Little Henry'Black-eyed Susan