Overview

Corydalis aff. smithiana is a clump forming herbaceous perennial in the genus Corydalis, part of the Papaveraceae family, with deciduous, evergreen foliage. Corydalis aff. smithiana grows best in partial shade, and tolerates loam soils and any pH. Its UK hardiness is rated H5. Suggested uses include rock garden, patio and container plants, cottage and informal garden, flower borders and beds and underplanting of roses and shrubs.

About

Corydalis aff. smithiana is a clump-forming cultivar of the Corydalis genus, which comprises annuals, biennials, and perennials with tuberous or rhizomatous growth. This plant features deciduous or evergreen foliage and produces racemes of spurred, tubular flowers in spring. It thrives in partial shade on moist but well-drained loam soils with a range of pH levels, from acid to alkaline. Hardy to UK zone H5, it suits various garden settings including rock gardens, flower borders, and underplanting of roses and shrubs, and can be propagated by division or seed sown as soon as ripe.

Growing conditions

Best soil and position for Corydalis

Sunlight
Partial shade
Soil type
Loam
Soil pH
Acid, Alkaline, Neutral
Soil moisture
Moist but well-drained
Aspect
East-facing, North-facing, South-facing, West-facing
Exposure
Exposed, Sheltered
UK hardiness
H5

Plant details

Corydalis aff. smithiana size, habit and characteristics

Plant type
Herbaceous Perennial
Habit
Clump forming
Foliage
Deciduous, Evergreen
Suggested uses
Rock garden, Patio and container plants, Cottage and informal garden, Flower borders and beds, Underplanting of roses and shrubs

Care notes

Pruning and caring for Corydalis aff. smithiana

Propagation
Division, Seed sown as soon as ripe
Pest resistance
Slugs, Snails
Disease resistance
Generally disease-free

Frequently asked questions

Where is the best place to plant Corydalis aff. smithiana?

Corydalis aff. smithiana prefers partial shade. It suits exposed and sheltered positions.

What soil does Corydalis aff. smithiana need?

Corydalis aff. smithiana grows best in loam soil. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.

Is Corydalis aff. smithiana hardy in the UK?

Corydalis aff. smithiana has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.

How do I propagate Corydalis aff. smithiana?

Division, Seed sown as soon as ripe.

More in the Corydalis genus

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