When to plant Pacific bleeding heart?
Best month and method — Dicentra formosa
Plant your pacific bleeding heart in March, April, September and October — the optimal month is usually September.
The next planting window is September.

Spacing
30 cm
≈ 11 plants
For an X m² border, calculate: X × 11 plants.
Step by step: plant pacific bleeding heart
Dicentra formosa thrives in partial to full shade, making it ideal for woodland gardens, shady borders, or beneath deciduous trees. Choose a spot sheltered from strong winds and hot afternoon sun, which can scorch the delicate foliage. The soil should be moisture-retentive yet well-drained; loam or peat-rich soil is perfect. Before planting, dig in plenty of organic matter—well-rotted compost or leaf mould—to improve structure and water retention. Plant bare-root or potted specimens in March, April, September, or October. Autumn planting allows roots to establish before winter, while spring planting gives a full growing season ahead. Dig a hole roughly twice the width of the root ball and deep enough so the crown sits just at or slightly below soil level. Space plants 30 cm apart to allow for their spreading habit; they will gradually form attractive clumps via rhizomes. Place the plant in the hole, backfill with the excavated soil mixed with compost, and firm gently to eliminate air pockets. Water thoroughly after planting to settle the roots and ensure good soil contact. Apply a 5 cm layer of organic mulch—bark chips or leaf mould work well—around the base, keeping it clear of the crown to prevent rot. This mulch conserves moisture and suppresses weeds, both important for establishing young plants. Keep the soil consistently moist during the first growing season, especially in dry spells, to encourage strong root development.