Corydalis curviflora subsp. rosthornii Blue Heron (Fumewort)

Noted for its incredibly dark blue flowers, Corydalis curviflora subsp. rosthornii ‘Blue Heron’ (Fumewort) is a showy, erect perennial forming an attractive mound of lacy, highly divided, blue-green leaves. From late spring to mid-summer, large, very fragrant, sapphire blue flowers are produced atop stunning red stems above the foliage

Noted for its incredibly dark blue flowers, Corydalis curviflora subsp. rosthornii 'Blue Heron' (Fumewort) is a showy, erect perennial forming an attractive mound of lacy, highly divided, blue-green leaves. From late spring to mid-summer, large, very fragrant, sapphire blue flowers are produced atop stunning red stems above the foliage, creating a remarkable contrast. Easy to grow, this Fumewort goes summer dormant in hot areas but can bloom right through to late fall in cool summer areas. Perfect for the shade garden.

  • Grows in clumps, 8-10 in. tall and wide (20-25 cm). Does not self-seed.
  • Best in part shade, in moderately fertile, evenly moist, well-drained soils. Tolerates full shade. Dislikes summer drought.
  • Virtually disease free. Watch for snails and slugs.
  • A great perennial plant for beds and borders, cottage gardens, rock gardens, or woodlands
  • Propagate by division in autumn

Requirements

Hardiness 6
– 8

Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Corydalis – Fumeworts
Exposure Partial Sun, Shade
Season of Interest Spring (Late)Summer (Early,Mid)
Height 8"
– 10"
(20cm
– 25cm)
Spread 8"
– 10"
(20cm
– 25cm)
Spacing 10″ (25cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Fragrant, Showy
Tolerance Rabbit
Garden Uses Beds and Borders, Edging, Underplanting Roses and Shrubs
Garden Styles Gravel and Rock Garden, Informal and Cottage