Overview

Stylophorum diphyllum is a plant with a herbaceous perennial habit in the genus Stylophorum, part of the Papaveraceae family, with deeply divided leaves foliage. Stylophorum diphyllum grows best in partial shade and full shade, and tolerates loam soils and any pH. Its UK hardiness is rated H5. Suggested uses include woodland garden, shady border and groundcover. It is native to Ontario.

About

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.

About the genus

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

Wikipedia contributors, "Stylophorum", CC BY-SA 4.0 — Stylophorum

In the garden

Stylophorum diphyllum is an herbaceous perennial in the Papaveraceae, native to Ontario. It carries deeply divided leaves and produces deep yellow flowers in April to May, providing a short, concentrated display on the woodland floor. Give it partial to full shade on a loam-based soil that stays moist but drains freely; it tolerates acid, neutral and alkaline pH. Sitings on north-, east- or west-facing aspects are appropriate, and a sheltered position will reduce winter desiccation. It is rated H5 in UK terms, meaning it is classed as hardy across much of the country when placed out of driving wind and kept out of drought-prone ground. Use Stylophorum diphyllum in a woodland garden, shady border or as a ground cover beneath trees and shrubs where leaf litter and dappled light replicate its natural setting. The April to May flowering window is short but distinct, so planting it where the flowers can be seen at close range makes the most of its seasonality.

Growing conditions

Best soil and position for Stylophorum

Sunlight

Partial shade, Full shade

Soil type

Loam

Soil pH

Acid, Alkaline, Neutral

Soil moisture

Moist but well-drained

Aspect

North-facing, East-facing, West-facing

Exposure

Sheltered

UK hardiness

H5

Plant details

Stylophorum diphyllum size, habit and characteristics

Habit

Herbaceous perennial

Foliage

Deeply divided leaves

Suggested uses

Woodland garden, Shady border, Groundcover

Native to

Ontario

Care notes

Pruning and caring for Stylophorum diphyllum

Propagation

Divide in spring, Sow seed in containers in fall

Pest resistance

Slugs, Snails

Disease resistance

Generally disease-free

Frequently asked questions