Macleaya cordata is a tall herbaceous perennial that typically reaches about 2.0 metres and carries plume-like summer flower heads. It favours a sunny position in soils that range from sandy to clay, provided they remain moist but well-drained. Plants form large basal foliage and offer architectural scale at the back of a border. Flowering occurs from July to September.

Plume poppy (Macleaya cordata) is a tall perennial for full sun in moist, well-drained soils that flowers from July to September.

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

Macleaya, or plume poppy, is a genus of two or three species of flowering plants in the poppy family Papaveraceae, native to Japan and China. They are large rhizomatous herbaceous perennials with palmately lobed, frilly leaves of olive green or grey colour, 25 cm (10 in) long, and tall stems with airy plumes of petal-less, tubular, off-white or cream flowers.

Macleaya cordata

Plume poppy | Macleaya cordata

Macleaya kewensis is a rhizomatous herbaceous perennial noted for tall stems topped by airy, petal-less plumes. It originates from East Asia and produces clusters of off-white to cream flowers from July to September. Leaves are palmately lobed and range from olive green to grey, and the stems commonly reach 1.2–1.8 m. The plant spreads both by underground suckers and by seed, so allow space or containment.

Plume Poppy (Macleaya kewensis) forms tall stems of cream, petal-less plumes from July to September and spreads by rhizomes and seed.

Macleaya kewensis

Plume Poppy | Macleaya kewensis

Macleaya microcarpa 'Coral Plume' is a herbaceous perennial that reaches about 2 metres and is grown for its tall summer flowering stems. It blooms from July to September. It suits full sun to partial shade and prefers moist, well-drained soil. It is rated H5, so is hardy in most UK gardens; allow space for its height when siting it at the back of a border.

Macleaya microcarpa 'Coral Plume' is a herbaceous perennial to 2 metres that flowers from July to September and prefers full sun to partial shade on.