Silphium Morhii is a species in the genus Silphium. In the UK it flowers from July to September. Details of appearance and cultural needs vary across the genus, so confirm provenance and specific care with the supplier. Follow the plant label when deciding placement and maintenance.

Silphium Morhii flowers in the UK from July to September and should be purchased with clear provenance and care notes.

Silphium Morhii

Silphium Morhii | Genus Silphium, flowers Jul-Sep

Silphium Perfoliatum is a species in the genus Silphium. It is notable for producing its flowers in the UK from July to September. Detailed cultivation requirements vary between sources, so check specialist references before purchase. When sourcing plants, confirm botanical identity with the supplier.

Silphium Perfoliatum is a species in the genus Silphium that flowers in the UK from July to September.

Silphium Perfoliatum

Silphium Perfoliatum | Summer-flowering Silphium

Silphium albiflorum is a cultivar of the Silphium genus, known for its bushy, columnar upright habit and deciduous foliage. As a sturdy herbaceous perennial, it thrives in full sun or partial shade and is suited to south- or west-facing aspects. It prefers fertile, moist but well-drained loam or clay soils with a pH ranging from acid to alkaline. This cultivar is hardy in the UK (H7) and is valued for its architectural presence in cottage and informal gardens, as well as flower borders and beds. It is best propagated by seed or division and offers seasonal interest in spring and summer.

Silphium albiflorum is a hardy herbaceous perennial with a bushy, columnar habit, perfect for architectural borders in spring and summer.

Silphium albiflorum

Silphium mohrii is a cultivar of the Silphium genus, known for its bushy, columnar upright habit and deciduous foliage. As a member of the Asteraceae family, it thrives in full sun or partial shade and prefers fertile, moist but well-drained soils such as loam or clay with a range of pH levels. This hardy perennial is suitable for exposed or sheltered south- or west-facing aspects and is valued for its architectural presence in cottage and informal gardens, as well as flower borders and beds. It is propagated by seed or division and is of interest during spring and summer.

Silphium mohrii features a bushy, columnar habit with deciduous foliage, thriving in full sun or partial shade for architectural and cottage gardens.

Silphium mohrii

Silphium perfoliatum (Dixter Form) is an erect herbaceous perennial in the Asteraceae, notable for its yellow, daisy-like composite flower heads. Flowering runs from July to September. Leaves are triangular and toothed and the stems are stout and square‑angled. It is typically used where a tall, architectural summer presence is wanted.

Silphium perfoliatum (Dixter Form) is an erect perennial with yellow composite flowers from July to September that favours reliably moist soil.