Senecio angustifolia is a columnar upright cultivar of the diverse Senecio genus, which includes annuals, perennials, shrubs, and climbers, some with succulent traits. This semi-evergreen plant thrives in full sun or partial shade, favouring sheltered, south-, east-, or west-facing aspects. It grows best in fertile, well-drained loam or sandy soils with an acid to neutral pH. Hardy to UK zone H4, it is suitable for city and courtyard gardens, informal borders, patios, and container planting. Interest is mainly in spring and summer, with propagation by seed sown with heat or division in spring.

Senecio angustifolia is a semi-evergreen, columnar plant ideal for city gardens and containers, flowering in spring and summer with RHS H4 hardiness.

Senecio angustifolia

Senecio cineraria is a perennial in the Asteraceae prized for its dense, silver, felt-like leaves. It typically grows to around 0.6 m and carries its foliage above branching stems. It flowers from June to September. It is often sold under the common name Dusty Miller.

Silver Ragwort (Senecio cineraria) has silver, felted leaves, flowers June to September and prefers full sun with well-drained soil.

https://en.wikipedia.org/wiki/Jacobaea_maritima

Jacobaea is a genus of flowering plants in the tribe Senecioneae and the family Asteraceae. Its members used to be placed in the genus Senecio, but have been separated into the segregate genus Jacobaea on the basis of molecular phylogenetics in order to maintain genera that are monophyletic.

Senecio cineraria

Silver Ragwort | Senecio cineraria

Senecio cineraria 'Hoar Frost' is a perennial in the Asteraceae grown for its silvery, felt-like foliage and compact habit. It reaches about 0.6 m and keeps a pale, hoary leaf texture all season. Flowering occurs from June to September. The foliage is the primary ornamental feature; the plant is toxic if ingested.

Hoar Frost Dusty Miller (Senecio cineraria 'Hoar Frost') is a perennial with silvery, felt-like leaves that flowers June to September and prefers full sun.

Senecio cineraria 'Hoar Frost'

Hoar Frost Dusty Miller | Senecio cineraria 'Hoar Frost'

Senecio cineraria 'White Diamond' is a perennial in the Asteraceae grown for its silvery, felted foliage and compact habit, reaching about 0.6 m. It prefers full sun on a south-facing aspect and performs on a range of soils provided they drain. Flowering occurs from June to September. Take care: the plant is toxic if ingested.

White Diamond Dusty Miller (Senecio cineraria 'White Diamond') is a sun-loving perennial for south-facing borders and containers, flowering June to.

Senecio cineraria 'White Diamond'

White Diamond Dusty Miller | Senecio cineraria 'White Diamond'

Senecio clivorum is a flowering species in the genus Senecio, family Asteraceae. In the UK it flowers from June to September. Cultivation needs and frost tolerance vary across Senecio species, so confirm requirements with the supplier or plant label before planting out. Note flowering dates for future siting and winter care decisions.

Senecio clivorum is a Senecio (Asteraceae) species that flowers in the UK from June to September.

Senecio is a genus of flowering plants in the daisy family (Asteraceae) that includes groundsels and some ragworts. Variously circumscribed taxonomically, the genus Senecio is one of the largest genera of flowering plants.

Senecio clivorum

Senecio doronicum is a perennial herb in the daisy family (Asteraceae) that flowers through the summer. It is native to parts of central and southern Europe, including Germany, Switzerland, Portugal and several Balkan countries. Plants favour well-drained loamy or sandy soils with a neutral to alkaline pH and will tolerate full sun to partial shade. In the UK it is fully hardy and flowers from June to September.

Chamois ragwort (Senecio doronicum) is a fully hardy perennial herb for rock and alpine gardens, flowering June to September.

Senecio doronicum

Chamois ragwort | Senecio doronicum

Senecio from Colombia is an herbaceous perennial in the Asteraceae with a columnar upright habit and semi-evergreen foliage. It suits full sun to partial shade and prefers well-drained loam or sandy soils with an acid to neutral reaction. Flowering occurs from June to September. The plant is rated H4 for UK hardiness and performs best in a sheltered, south-, east- or west-facing position.

Senecio from Colombia is a columnar, semi-evergreen herbaceous perennial that flowers June to September and prefers well-drained loam or sand.

Senecio from Colombia

Senecio oxyriifolius is a columnar upright cultivar within the diverse Senecio genus, which includes annuals, perennials, shrubs, and climbers, some with succulent traits. This semi-evergreen plant thrives in full sun or partial shade and prefers sheltered positions with fertile, well-drained loam or sandy soil of acid to neutral pH. Hardy to UK zone H4, it is suitable for various garden settings such as city courtyards, cottage gardens, patios, and flower borders. Its season of interest spans spring and summer, and it can be propagated by seed sown with heat or by division in spring.

Senecio oxyriifolius is a semi-evergreen, columnar plant ideal for city gardens and patios, thriving in full sun or partial shade with spring and summer

Senecio oxyriifolius

Senecio palmeri 'Silver and Gold' is a columnar upright cultivar of the diverse Senecio genus, which includes annuals, perennials, shrubs, and climbing plants, some with succulent traits. This semi-evergreen plant thrives in full sun or partial shade and prefers fertile, well-drained loam or sandy soils with an acid to neutral pH. Hardy to UK zone H4, it suits sheltered south, east, or west-facing aspects. It is ideal for city and courtyard gardens, patios, flower borders, and informal settings, offering interest through spring and summer. Propagation is by seed sown with heat in spring or division as growth begins.

Senecio palmeri 'Silver and Gold' is a semi-evergreen, columnar plant ideal for city gardens and patios, flowering in spring and summer with RHS H4 hardiness.

Senecio palmeri 'Silver and Gold'

Senecio polyodon var. subglaber is a columnar upright cultivar of the diverse Senecio genus, which includes annuals, perennials, climbers, and shrubs, some with succulent traits. This semi-evergreen plant thrives in full sun or partial shade and prefers sheltered positions with fertile, well-drained loam or sandy soils that are acid to neutral in pH. Hardy to UK zone H4, it is suitable for various garden settings such as city courtyards, cottage gardens, patios, and flower borders. Its season of interest spans spring and summer, and it can be propagated by seed sown with heat in spring or by division as growth begins.

Senecio polyodon var. subglaber thrives in full sun or partial shade, hardy to RHS H4, ideal for patios, borders, and city gardens in spring and summer.

Senecio polyodon var. subglaber

Senecio pulcher is a perennial in the Asteraceae grown for its radiate flower heads bearing long red-purple rays around a yellow disc. Native to South America, it favours reliably moist, well-drained sites. It flowers in the UK from June to September. Plants do best in positions that receive full sun or partial shade.

Tyerman's Groundsel (Senecio pulcher) flowers June to September with red-purple rays and a yellow centre in moist, well-drained soils.

https://en.wikipedia.org/wiki/Senecio_pulcher

Senecio pulcher

Tyerman's groundsel | Senecio pulcher

Senecio smithii is a species of Senecio in the daisy family (Asteraceae) known by the common name Magellan ragwort. It originates from southern South America, including Tierra del Fuego and several Argentine and Chilean provinces. In the UK it flowers from June to September. The plant’s taxonomic placement within Senecio links it to a large, varied group of daisy-family species.

Magellan ragwort (Senecio smithii) is a South American member of the Asteraceae that flowers in the UK from June to September.

Senecio smithii

Magellan ragwort | Senecio smithii

Senecio tanguticus is a species in the daisy family Asteraceae, native to Tibet and China, noted for its seasonal flowering. It produces its flowers from June to September. Plants should be sourced from reputable specialists familiar with mountain and regional Asian material. Observe the plant through a full season in a pot before placing it in a permanent spot so you can judge its behaviour in your garden.

Senecio tanguticus is a member of the Asteraceae native to Tibet and China, flowering from June to September.

Senecio tanguticus

Senecio thapsoides is a columnar upright cultivar within the diverse genus Senecio, which includes annuals, perennials, shrubs, and climbing plants, some with succulent traits. This semi-evergreen plant thrives in fertile, well-drained loam or sandy soils with acid to neutral pH, preferring full sun or partial shade in sheltered, south-, east-, or west-facing aspects. Hardy to UK zone H4, it is suitable for city and courtyard gardens, informal borders, patios, and container planting. Interest is mainly in spring and summer, with propagation by seed sown with heat or division in early spring.

Senecio thapsoides is a semi-evergreen, columnar plant ideal for city gardens and patios, flowering in spring and summer with RHS H4 hardiness.