How to Grow Celandine Poppy — Stylophorum

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Stylophorum–commonly called Celandine poppy–is woodland perennial that produces clusters of saucer-shaped, four-petaled , poppylike flowers in shades of yellow or orange.

Stylophorum diphyllum is an 18-inch species native to the eastern United States. The deeply lobed, scallop -margined leaves form 12 inch wide mounds. The flowers are 1- to 2-inches wide and appear spring to summer.

Stylophorum is best grown in partial to full shade in humus-rich, moist soil. Where Stylophorum is happy it will self sow.

Stylophorum is a genus of 3 species of herbaceous perennials native to woodland in eastern North America and eastern Asia.

Get to know Stylophorum

  • Plant type: Perennial
  • Growing zones and range: Zones 5-8
  • Hardiness: Hardy to Zone 5
  • Height and width: 12 inches (30cm) tall and wide
  • Foliage: Deeply lobed 8 to 12 inch leaves with scallopted margins
  • Flowers: Suacer-shaped, poppy-like, four-petaled, yellow or orange blossoms borne in terminal umbels
  • Bloom time: Spring and summer
  • Uses: Shade border, rock garden
  • Common name: Flaming poppy, Celandine poppy
  • Botanical name: Stylophorum
  • Family name: Papaveraceae
  • Origin: Woodlands in eastern North America and eastern Asia.
Styloporum diphyllum

Where to plant Stylophorum

  • Plant Stylophorum in partial to full shade; plants will survive in full sun but can becom scorchted.
  • Grow Stylophorum in average to humus-rich soil.

When to plant Stylophorum

  • Set container grown Stylophorum outdoors in spring or autumn.

Planting and spacing Stylophorum

  • Space Stylophorum 12 inches (30cm) apart.

How to water and feed Stylophorum

  • Keep the soil evenly moist for Stylophorum.
  • Fertilize Stylophorum with an all-purpose organic fertilizer in spring.

Stylophorum care

  • Stylophorum will self-sow and can become weedy it not watched.

Stylophorum pests and diseases

  • Stylophorum may be attacked by slugs and snails.

Stylophorum propagation

  • Sow seed in containers in a cold frame in autumn.
  • Divide Stylophorum in spring; can be slow to re-establish.

Stylophorum varieties to grow

  • Stylophorum diphyllum, celandine poppy, flaming poppy. Perennial grows to 12 inches tall and wide; downy rosette-forming; deeply incised mid-green leaves; bright golden yellow flowr to 1 inch across; blooms in summer.

Written by Stephen Albert

Stephen Albert is a horticulturist, master gardener, and certified nurseryman who has taught at the University of California for more than 25 years. He holds graduate degrees from the University of California and the University of Iowa. His books include Vegetable Garden Grower’s Guide, Vegetable Garden Almanac & Planner, Tomato Grower’s Answer Book, and Kitchen Garden Grower’s Guide. His Vegetable Garden Grower’s Masterclass is available online. has more than 10 million visitors each year.

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