Chelidonium majus 'Flore Pleno' is a double-flowered form of Chelidonium in the poppy family Papaveraceae. It produces yellow blooms in the UK from April to July. The foliage is blue-green and pinnate, and the plant behaves as a perennial herbaceous species.

Chelidonium majus 'Flore Pleno' produces double yellow flowers in the UK from April to July and has blue‑green pinnate leaves.

Chelidonium, commonly known as celandines, is a small genus of flowering plants in the poppy family, This genus is native to northern Africa and Eurasia, where they are widespread, ranging from western Europe to east Asia.

Chelidonium majus 'Flore Pleno'

Greater Celandine | Chelidonium majus 'Flore Pleno'

Corydalis bulbosa is a species in the genus Corydalis, placed in family Q144723, and is characterised by a spring flowering period. In the UK it flowers from April to June. Cultivation details vary across Corydalis species and cultivars, so check supplier information for precise siting and hardiness. Observe the plant through its April–June flowering to determine whether its habit and flowering suit your garden.

Corydalis bulbosa flowers in the UK from April to June, so check supplier labels for specific cultivation and hardiness guidance.

Corydalis is a genus of about 540 species of annual and perennial herbaceous plants in the family Papaveraceae, native to the temperate Northern Hemisphere and the high mountains of tropical eastern Africa. They are most diverse in China and the Himalayas, with at least 357 species in China.

Corydalis bulbosa

Corydalis chaerophylla is a species of Corydalis in the poppy family (Papaveraceae) that flowers in the UK from April to June. It sits within a genus of roughly 540 herbaceous annual and perennial species distributed across the temperate Northern Hemisphere and high mountains of tropical eastern Africa. Members of the genus are botanically unusual among dicots in having only a single cotyledon. Some Corydalis species are used as food plants by the larvae of particular butterflies and several contain alkaloids, so check supplier notes when sourcing plants.

Corydalis chaerophylla flowers in the UK from April to June and is a member of the Corydalis genus in the poppy family.

Corydalis chaerophylla

Corydalis ophiocarpa is a species in the genus Corydalis, placed in the family Papaveraceae, that flowers in the UK from April to June. Its spring flowering window is its most reliable identifying and horticultural feature. Exact habit and cultivation needs vary between Corydalis taxa, so consult the plant label or supplier notes for specifics. Time any deadheading or seed collection to the April–June flowering period.

Corydalis ophiocarpa flowers in the UK from April to June and belongs to the genus Corydalis in the Papaveraceae.

Corydalis ophiocarpa

Corydalis scouleri is a perennial herb native to British Columbia that produces a spring display from April to June. It suits partial shade or shade and favours moist, well-drained, humus-rich soil. Plant it where it can sit quietly in the shade layer, such as beneath shrubs or among woodland bulbs.

Scouler's fumewort (Corydalis scouleri) prefers moist, humus-rich, well-drained soil in partial shade and flowers April to June.

Corydalis scouleri

Scouler's fumewort | Corydalis scouleri

Corydalis thalictrifolia is a herbaceous species placed in the genus Corydalis within the poppy family (Papaveraceae) and flowers in the UK from April to June. The genus contains both annual and perennial herbs and is especially diverse in China and the Himalayas. Corydalis species are ecologically significant as food plants for some butterfly larvae and several members of the genus contain alkaloids that can be toxic.

Corydalis thalictrifolia is a Corydalis species that flowers in the UK from April to June.

Corydalis thalictrifolia

Glaucium falvum var. aurantiacum is a taxon within the genus Glaucium, placed in the poppy family Papaveraceae. It is noted for its defined UK flowering period, from June to September. Plants in this group are of interest to collectors and specialists working with Papaveraceae. Identification and flowering records are useful when comparing it with other Glaucium taxa.

Glaucium falvum var. aurantiacum blooms in the UK from June to September and belongs to the family Papaveraceae.

Glaucium falvum var. aurantiacum

Hylomecon japonicum is a shade-tolerant, spring-flowering perennial from Japan used as a ground cover in woodland plantings. It flowers April to May and prefers partial shade to full shade. Plant in moist, well-drained, humus-rich soil with an acidic to neutral pH. It is H5 hardy in the UK.

Japanese wood poppy (Hylomecon japonicum) is a spring-flowering perennial for shady, humus-rich, moist soils in the UK.

Hylomecon is a genus of flowering plants in the family Papaveraceae. Its species are native to China, Korea, Japan and the Russian Far East.

Hylomecon japonicum

Japanese wood poppy | Hylomecon japonicum

Lamprocapnos spectabilis 'Alba' is a clump-forming perennial in the poppy family that produces pendent, heart-shaped white flowers. It has deciduous foliage and performs best in partial shade on moist, neutral loam. Plant in a sheltered, north-, east- or west-facing spot and expect blooms in the UK from April to June.

Bleeding Heart Lamprocapnos spectabilis 'Alba' bears heart-shaped white flowers from April to June and prefers a sheltered, partly shaded neutral loam.

Lamprocapnos spectabilis 'Alba'

Bleeding Heart | Lamprocapnos spectabilis 'Alba'

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, 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 kewensis

Plume Poppy | Macleaya kewensis

Meconopsis chelidoniifolia is a perennial rosette-forming plant producing tall, upright flower stems from a basal cluster of leaves. The basal foliage is deciduous, hairy and toothed or lobed, sometimes showing a bronze tint. It prefers partial shade on a north or east-facing, sheltered site and flowers in the UK from May to July. The plant suits deep, humus-rich, leafy loam that is acid to neutral and kept reliably moist yet freely draining.

Meconopsis chelidoniifolia is a rosette-forming Himalayan perennial that flowers May to July and prefers partial shade and deep, humus-rich, acid to.

Meconopsis are the Himalayan poppies, and the blue-flowered species are among the most coveted and most exacting plants in cultivation. The flowers are large, silky and translucent, held on tall bristly stems above rosettes of hairy, often bronze-tinted leaves, and the pure sky blue of the finest forms is unmatched by anything else hardy. Not all are blue - there are excellent yellow and red species too - and the genus includes both reliable perennials and monocarpic kinds that flower once and die.

Meconopsis chelidoniifolia

Meconopsis regia is a perennial rosette-forming poppy with tall, upright flower stems. It forms deciduous, hairy basal rosettes that are toothed or lobed and can develop a bronze tint. Plant in a sheltered, north- or east-facing spot with deep, humus-rich leafy loam that stays cool and reliably moist. Flowers appear in May to July.

Royal poppy (Meconopsis regia) forms hairy basal rosettes and tall flower stems and suits sheltered, north- or east-facing, humus-rich sites.

Meconopsis regia

Royal poppy | Meconopsis regia

Meconopsis superba is a rosette-forming perennial in the poppy family that sends up tall, upright flower stems from a basal leaf rosette. The basal leaves are deciduous, hairy and toothed or lobed, sometimes showing a bronze tint. It flowers in the UK from May to July and prefers partial shade with shelter from hot sun. Plant in deep, humus-rich, leafy loam that stays cool and moist but drains freely.

Meconopsis superba is a rosette-forming perennial that flowers May to July and favours sheltered, north- or east-facing, moist acidic soil.

Meconopsis superba

Meconopsis × sarsonsii is a perennial in the poppy family that forms a basal rosette and sends up tall, upright flower stems. The basal leaves are deciduous, hairy and toothed or lobed, and can be bronze-tinted. It prefers partial shade on a north or east-facing, sheltered site with deep, humus-rich, leafy loam. Flowers appear from May to July.

Meconopsis × sarsonsii is a rosette-forming perennial that flowers May to July and prefers partial shade on deep, acid to neutral, humus-rich soil.

Meconopsis × sarsonsii

Meconopsis × sheldonii is a perennial in the poppy family (Papaveraceae) that forms a basal rosette and sends up tall, upright flower stems. The foliage is deciduous, hairy and toothed or lobed, often with a bronze tint. It flowers from May to July. Give it partial shade and shelter from hot sun for best performance.

Meconopsis × sheldonii is a perennial Meconopsis that flowers May to July and prefers north- or east-facing, sheltered sites with moist, acidic loam.

Meconopsis × sheldonii

Meconopsis × sheldonii 'Archie Campbell' is a perennial in the poppy family that forms a basal rosette and sends up tall, upright flower stems. Leaves are deciduous, hairy and toothed or lobed, sometimes taking a bronze tint. It flowers from May to July. It prefers a sheltered, north- or east-facing site in partial shade and away from hot sun.

Meconopsis × sheldonii 'Archie Campbell' is a perennial Meconopsis with hairy, toothed basal rosettes that flowers May to July.

Meconopsis × sheldonii 'Archie Campbell'

A perennial in the poppy family, Meconopsis × sheldonii 'Branklyn' forms a basal rosette and produces tall, upright flower stems. The leaves are deciduous, hairy and toothed or lobed, with rosettes that can take on a bronze tint. It flowers in the UK from May to July. Give it partial shade on a north- or east-facing, sheltered site in humus-rich, leafy soil.

Meconopsis × sheldonii 'Branklyn' is a rosette-forming Meconopsis that flowers May to July and prefers north- or east-facing, sheltered sites in.

Meconopsis × sheldonii 'Branklyn'

Meconopsis × sheldonii 'Quarriston' is a perennial in the poppy family that forms a basal rosette and produces tall, upright flowering stems. The basal leaves are hairy and toothed or lobed and can be bronze-tinted. It flowers from May to July. Plants prefer a sheltered, north- or east-facing spot with protection from hot sun.

Meconopsis × sheldonii 'Quarriston' is a Meconopsis perennial with hairy basal rosettes and tall flower stems, flowering from May to July.

Meconopsis × sheldonii 'Quarriston'

A rosette-forming perennial with tall, upright flower stems, Meconopsis × sheldonii 'Slieve Donard' belongs to the poppy family Papaveraceae. It carries deciduous, hairy basal leaves that are toothed or lobed and can show a bronze tint. Best placed in partial shade on a north- or east-facing, sheltered aspect, it needs reliably moist, cool yet freely draining soil. Flowering occurs from May to July.

Meconopsis × sheldonii 'Slieve Donard' prefers north- or east-facing, sheltered sites with deep, acidic humus-rich soil that stays cool and moist.

Meconopsis × sheldonii 'Slieve Donard'

Meconopsis × sheldonii 'Springhill' is a perennial in the poppy family that forms a basal rosette and sends up tall, upright flower stems. Leaves are hairy and toothed or lobed, often taking on a bronze tint. It prefers a sheltered, north- or east-facing position out of hot sun. Flowers appear from May to July.

Meconopsis × sheldonii 'Springhill' is a perennial poppy-family plant with rosette foliage and tall flower stems, flowering May to July.

Meconopsis × sheldonii 'Springhill'

Meconopsis × sheldonii Crewdson Hybrids is a perennial in the poppy family that forms a basal rosette and sends up tall, upright flower stems. The basal foliage is deciduous, hairy and toothed or lobed and can be bronze-tinted. It flowers May to July and favours partial shade with shelter from hot sun. Plant in deep, humus-rich, leafy loam that stays cool and reliably moist while draining freely.

Meconopsis × sheldonii Crewdson Hybrids flowers May to July and suits sheltered, north- or east-facing sites with deep, humus-rich, acid to neutral soil.

Meconopsis × sheldonii Crewdson Hybrids

Papaver (Oriental Group) 'Flamenco Dancer' is a named cultivar in the Oriental group of poppies, offered under the botanical name in the family Papaveraceae. It is sold for its summer flowering habit, producing blooms in the UK from May to August. As part of the Papaver genus it shares the structural traits of poppies, including the development of a seed capsule after flowering that releases many small seeds.

Papaver (Oriental Group) 'Flamenco Dancer' flowers in the UK from May to August and is a cultivated Oriental poppy in the family Papaveraceae.

Papaver (Oriental Group) 'Flamenco Dancer'

Papaver (Oriental Group) 'Flamenco Dancer' | Oriental poppy

Papaver (Oriental Group) 'Redizelle' is a cultivar of oriental-group poppy in the family Papaveraceae and the genus Papaver, notable for its seasonal display of poppy flowers. Flowering runs from May to August. As with other poppies, the bud sheds its two protective sepals as it opens and the spent flower develops a dry, disc-capped capsule that contains many tiny seeds.

Papaver (Oriental Group) 'Redizelle' flowers from May to August and sets papery, disc-capped seed capsules that shed many tiny seeds.

Papaver (Oriental Group) 'Redizelle'

Papaver (Oriental Group) 'Redizelle' | Oriental Poppy

Papaver pilosum is a poppy in the genus Papaver, its common name reflecting the fine hairs found on the flowering stems. As with other Papaver species, the flowers have caducous sepals and multiple petals arranged around numerous stamens, and the ovary develops into a dry capsule. It flowers in the UK from May to August. Mature capsules release many tiny seeds that can be collected or left to self-sow.

Hairy-stemmed poppy Papaver pilosum flowers from May to August and sets seed in dry capsules that can be collected for sowing.

Papaver is a genus of 70–100 species of frost-tolerant annuals, biennials, and perennials native to temperate and cold regions of Eurasia, Africa and North America. It is the type genus of the poppy family, Papaveraceae.

Papaver pilosum

Hairy-stemmed poppy | Papaver pilosum

Papaver spicatum is a species of poppy in the genus Papaver, member of the poppy family Papaveraceae. As with other Papaver species, its buds shed their two sepals as they open and the flowers typically have four to six petals. It produces a rounded capsule fruit which later releases numerous tiny seeds. In the UK it flowers from May to August.

Papaver spicatum is a poppy that flowers May to August and forms seed-bearing capsules that release tiny seeds.

Papaver spicatum

Romneya × hybrida 'White Cloud' is a perennial Matilija poppy valued for its summer flowering. Native to California, USA, it prefers full sun and well-drained soils and tolerates dry to medium moisture. Place it in a fully exposed site where its June to August blooms and mild fragrance can be appreciated.

White Cloud Matilija Poppy (Romneya × hybrida 'White Cloud') is a perennial Californian poppy that flowers June to August and prefers full sun with.

Romneya is a genus of flowering plants belonging to the poppy family (Papaveraceae). There are two species in the genus Romneya, which was named after the Irish astronomer John Thomas Romney Robinson; the first discovered species R.

Romneya × hybrida 'White Cloud'

White Cloud Matilija Poppy | Romneya × hybrida 'White Cloud'

Romneya × hybrida of gardens is a perennial shrub in the genus Romneya grown for its summer-flowering habit and a mild, sweet fragrance. It does best in full sun on well-drained sandy or loamy soil with a neutral to slightly alkaline pH. Plant on a south-facing aspect where soil remains dry to medium rather than waterlogged. It is hardy to H5 and suits ornamental borders and xeriscape schemes.

Matilija poppy is a perennial shrub (Romneya) that flowers from June to August and prefers full sun with well-drained, sandy or loamy soil.

Romneya × hybrida of gardens

Matilija poppy | Romneya × hybrida of gardens

Stylophorum diphyllum is an herbaceous perennial in the poppy family with deeply divided leaves and a spring flowering habit. It produces deep yellow blooms in April to May. Suited to sheltered, shady spots on moist loamy soil.

Wood poppy (Stylophorum diphyllum) is a hardy woodland perennial with deeply divided leaves and deep yellow flowers in April to May.

Stylophorum (celandine-poppy) is a genus of three species of herbaceous perennial plants native to woodland in eastern North America and China.