Corydalis 'Porcelain Blue'

Overview & Features

• Corydalis ‘Porcelain Blue’ is a compact, clump-forming perennial known for its striking turquoise-blue tubular flowers.

• Blooms continuously from late spring through summer and often into early autumn in cool conditions.

• Features delicate, fern-like grey-green foliage that provides soft texture.

• Typically grows to 30–40 cm in height.

• Excellent for woodland gardens, shaded borders, and cool patio containers.

• Attractive to bees and pollinators.

• Provides rare blue tones that stand out in shaded planting schemes.

This variety is especially valued for its long flowering season and unusual flower colour.

Planting & Positioning

• Plant in partial shade or light dappled shade for best results.

• Can tolerate gentle morning sun but avoid harsh afternoon sunlight.

• Prefers fertile, humus-rich, moisture-retentive but well-drained soil.

• Improve soil with compost or leaf mould before planting.

• Avoid very dry or exposed sites.

• Dig a hole slightly wider and the same depth as the pot.

• Position the crown level with the soil surface.

• Backfill, firm gently, and water thoroughly after planting.

• Space plants approximately 30–40 cm apart to allow for clump development.

Corydalis thrives in cool, sheltered spots with consistent soil moisture.

Watering, Feeding & Flowering

• Water regularly during the first growing season to establish strong roots.

• Keep soil consistently moist, particularly during warm weather.

• Avoid waterlogging, especially in winter.

• Apply a balanced, slow-release fertiliser in spring to encourage healthy growth.

• Alternatively, mulch annually with compost to enrich soil and retain moisture.

• Flowering typically begins in late spring and can continue for many months in cool conditions.

• Deadheading spent flowers encourages continued blooming.

Consistent moisture is key to prolonged flowering.

Pruning, Maintenance & General Care

• Remove faded flower stems regularly to promote further blooms.

• Cut back foliage if it becomes untidy during hot, dry periods.

• In autumn, trim back dying foliage once it naturally fades.

• Divide clumps every few years in spring if growth becomes congested.

• Apply mulch annually to conserve moisture and improve soil quality.

• Protect from prolonged drought, which can cause plants to go dormant.

• Generally low maintenance and resistant to most pests and diseases.

With partial shade, moisture-retentive soil, and regular feeding, Corydalis ‘Porcelain Blue’ will provide long-lasting, vibrant blue flowers and delicate foliage texture year after year.