Rheum, commonly known as rhubarb, is a bushy cultivar of the Rheum genus, which comprises sturdy herbaceous perennials growing from rhizomes. This cultivar features deciduous foliage and thrives in fertile, moist but well-drained loam soil with an acid to neutral pH. Suitable for full sun or partial shade and various garden aspects, it is hardy to UK zone H6. Its tall stems bear large clusters of small flowers, making it an architectural addition to cottage, informal, wildlife, and flower border gardens during spring and summer.

Rhubarb (Rheum) thrives in full sun or partial shade, hardy to RHS H6, ideal for architectural and wildlife gardens with spring and summer interest.

Rheum

Rhubarb | Rheum

Rheum alexandrae is a perennial in the knotweed family (Polygonaceae) valued for ornamental use in borders and water gardens. It originates from south-west China and flowers in the UK from June to July. Planting and handling require care because all parts are harmful if eaten; wear gloves and protective equipment when working with it.

Alexander's rhubarb (Rheum alexandrae) is a perennial for partial shade and moist, acidic to neutral soils, flowering in the UK from June to July.

Rheum alexandrae

Alexander's rhubarb | Rheum alexandrae

Rheum australe is a perennial herb native to the Himalayas that can reach about 3.0 m in height. It flowers in the UK from June to July. Plant it in full sun on loamy or clay soils that remain moist but drain well. Parts are harmful if eaten, so wear gloves and protective equipment when handling.

Himalayan rhubarb (Rheum australe) is a tall perennial that flowers June to July and prefers full sun on moist, well-drained loamy or clay soil.

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

Rheum australe

Himalayan rhubarb | Rheum australe

It is an extraordinary species of rhubarb (genus Rheum). At 1–2 m tall, the monocarpic inflorescences of R. nobile tower above the other shrubs and low herbs in its habitat, and it is visible across valleys from several kilometres. R. nobile is often called a glasshouse plant because of its outer curtain of translucent bracts which pass visible light, creating a greenhouse effect, while blocking ultraviolet radiation. These are likely defenses against the increased UV-B exposure and extreme cold in its high altitude range. It is native to Afghanistan, East Himalaya, Myanmar, Nepal, Pakistan and other regions. In the garden it prefers full sun and partial shade and loam soil. In UK gardens it is very hardy across most of the UK (RHS H6). Suggested uses include architectural, cottage and informal garden, wildlife gardens and flower borders and beds. It tolerates acid and neutral soils, moist but well-drained conditions and south-facing, east-facing, north-facing and west-facing aspects.

Rheum nobile, commonly known as Sikkim rhubarb, is a robust perennial in the Polygonaceae family. Characterized by its substantial lobed leaves and tall stems, this species produces large clusters of small flowers, adding unique texture to any plant collection.

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

Rheum nobile

Sikkim rhubarb | Rheum nobile

Rheum officinale is a perennial herb in the Polygonaceae that reaches around 2.0 m and produces prominent flowering stems in June to July. It prefers full sun on loamy or clay soils that remain moist but are well drained. Rated H6 (very hardy) it will tolerate typical UK winters across much of the country. Allow generous space for its height when siting it in a border or specimen position.

Chinese Rhubarb (Rheum officinale) is a perennial to 2.0 m that flowers in June–July and prefers full sun with moist, loamy or clay, well-drained soil.

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

Rheum officinale

Chinese rhubarb | Rheum officinale

Rheum palmatum is a tall perennial herbaceous plant in the knotweed family that can reach about 3.0 m. It is native to China and Vietnam and flowers in the UK from June to July. Plant in full sun on loamy or clay soils that remain moist but are well drained. Harmful if eaten; wear gloves and other protective equipment when handling.

Chinese rhubarb (Rheum palmatum) is a tall perennial that flowers June to July and suits moist, loamy or clay soils in full sun.

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

Rheum palmatum

Chinese rhubarb | Rheum palmatum

Rheum palmatum 'Atrosanguineum' is a perennial Rheum grown as an architectural, tall-stemmed specimen reaching about 3.0 m. It flowers in June to July and is valued at the back of large borders or as a single focal plant. Originating from China and placed in the Polygonaceae family, it prefers full sun on moist, loamy or clay soils. Wear gloves and other protective equipment when handling, as the plant is harmful if eaten and can be dangerous to pets.

Rhubarb 'Atrosanguineum' is a tall Rheum perennial from China that flowers in June to July and prefers full sun with moist loamy or clay soil.

Rheum palmatum 'Atrosanguineum'

Rhubarb 'Atrosanguineum' | Rheum palmatum 'Atrosanguineum'

Rheum palmatum 'Bowles' Variety' is a perennial in the knotweed family that reaches about 3.0 m and produces tall flowering stems above large palmate leaves. It flowers in June to July, with pink blooms presented on erect panicles. Plant in full sun on loamy or clay soils that remain moist but well-drained and expect it to tolerate UK conditions down to H6 (very hardy).

Rhubarb (Rheum palmatum 'Bowles' Variety') is a perennial to 3.0 m with pink flowers in June–July, best in full sun on moist loamy or clay soils.

Rheum palmatum 'Bowles' Variety'

Rhubarb | Rheum palmatum 'Bowles' Variety'

Rheum palmatum tanguticum is a perennial in the Polygonaceae that reaches about 2.0 m and is cultivated as an ornamental for borders. It flowers in June to July, producing pink blooms above the foliage. Plant in full sun on loamy or clay soil that stays moist but drains freely. Wear gloves and other protective equipment when handling because the plant is harmful if eaten.

Tangut rhubarb (Rheum palmatum tanguticum) is a fully hardy perennial to 2.0 m from China that flowers in June–July and suits sunny, moist loamy or clay.

Rheum palmatum tanguticum

Tangut rhubarb | Rheum palmatum tanguticum

Rheum webbianum is a species of herbaceous perennial rhubarb-relative in the family Polygonaceae from the southwestern Himalayan region, known in (Indian) English as Indian rhubarb, Gilgiti rhubarb or small Himalayan rhubarb. In the wild it grows across Nepal, Pakistan, Tibet and West Himalaya. Grow it in full sun and partial shade and loam soil. In UK gardens it is very hardy across most of the UK (RHS H6). It works well for architectural, cottage and informal garden, wildlife gardens and flower borders and beds. It tolerates acid and neutral soils, moist but well-drained conditions and south-facing, east-facing, north-facing and west-facing aspects. Plant in well-drained soil. Water during establishment.

Small Himalayan rhubarb (Rheum webbianum) is a robust herbaceous perennial belonging to the Polygonaceae family. Known also as Gilgiti rhubarb, it features substantial foliage and tall stems that bear clusters of small flowers, offering an intriguing addition to any botanical collection.

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

Rheum webbianum

Small Himalayan rhubarb | Rheum webbianum

Rheum x hybridum 'Poulton's Pride' is a bushy cultivar of rhubarb, a genus of sturdy herbaceous perennials known for their large foliage and tall stems with clusters of small flowers. This deciduous plant thrives in full sun or partial shade and prefers fertile, moist but well-drained loam soil with an acid to neutral pH. Suitable for a variety of garden settings including architectural, cottage, and wildlife gardens, it is hardy to UK zone H6. Best propagated by division in spring, 'Poulton's Pride' offers seasonal interest in both spring and summer.

Rhubarb 'Poulton's Pride' is a hardy, bushy perennial with large foliage and tall stems, ideal for architectural and wildlife gardens in spring and summer.