Papaver cambricum

This is a clump-forming, somewhat spreading herbaceous perennial. It typically reaches a height of 30 - 60 cm (1-2 ft) and spreads about 30 - 45 cm (1-1.5 ft) wide. While it can be short-lived in some conditions, it readily self-seeds, often forming delightful colonies, especially in moist, shaded areas.

Semi-evergreen to deciduous, depending on the climate. The leaves are deeply lobed or pinnately divided, resembling fern fronds, and are a fresh, bright green. They form attractive basal rosettes, providing good groundcover.

Produces delicate, cup-shaped, 4-petaled flowers that are usually bright yellow or occasionally orange, though white forms also exist. The flowers are typically 5-7 cm (2-3 inches) in diameter and are borne singly on slender stems held above the foliage. It has a remarkably long flowering season, from late spring through autumn (May to October), continuously producing new blooms.

Unlike many poppies, Papaver cambricum thrives in partial shade to full shade, especially in warmer climates where afternoon sun can be too intense. It can tolerate some morning sun.

Good frost hardiness (USDA Zones 5-8). It reliably overwinters outdoors.

Prefers moist, well-drained, humus-rich soil. It is adaptable to a range of soil types but performs best where the soil remains consistently moist. It dislikes very dry conditions.

Excellent for woodland gardens, shaded borders, cottage gardens, rock gardens (in shadier spots), and naturalized areas. Its airy texture and long bloom time make it a valuable filler plant and a delightful component of informal plantings. It can also be effective when allowed to self-seed among other shade-loving perennials.

Medium to high water requirement. Needs consistent moisture, especially during dry spells.

Very low maintenance. Deadhead spent flowers to prevent excessive self-seeding, or allow some to go to seed if naturalization is desired. The plant may die back in very hot or dry conditions but often re-emerges from seed. Generally pest and disease resistant.

Containerized plants can be planted from spring to early autumn.