The first of the coveted blue corydalises to be introduced, it produces fragrant clusters of long-spurred, azure flowers on a compact plant.
Compact and free-flowering. Blooms in spring, goes dormant with summer's heat, then returns in autumn to bloom once again.
Prefers partial shade and moderately fertile, well-drained soil.
Sow seed when fresh; germination may be erratic. Divide in fall.
Downy mildew, rust, aphids, slugs, snails; spider mites indoors.
‘Short Stack’ Dwarf Blue Star (Amsonia montana ‘Short Stack’): Compact Blue Blooms for Small Spaces
Corydalis cheilanthifolia – Fern-Leaved Corydalis with Bronzy Foliage
Corydalis lutea – Yellow Corydalis, Long-Blooming Shade Perennial
Corydalis 'Blackberry Wine' – Fragrant Pink-Purple Corydalis for Shade
'Butterfly Blue' Pincushion Flower (Scabiosa 'Butterfly Blue'): Long-Blooming Lavender Pincushions
Veronica 'Georgia Blue' (Speedwell): Tough Sky-Blue Groundcover
Paperbark Maple (Acer griseum): Four-Season Tree with Peeling Cinnamon Bark
Camassia 'Blue Danube': Violet Star Flowers for Spring
Campanula poscharskyana 'Blue Waterfall': Serbian Bellflower Groundcover
Corydalis scouleri – Scouler's Fumeroot, Western Native with Pink Flowers
Euphorbia 'Glacier Blue': Otherworldly Variegated Foliage & Giant Bract Clusters
Blue Spike Grape Hyacinth: Double Flax-Blue Heads for Longer Bloom
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