Crocosmia Norwich Canary

Description

Pot size: 3 litre pot
Plant size after 3 years: Height 0.8 meters (2.5 feet), Spread 0.5 meters (1.5 feet)
Foliage and flower colour: Green sword-shaped foliage; bright yellow flowers blooming mid to late summer
Suitable for USDA plant hardiness Zones: 6 to 9

GardenAdvice notes
Crocosmia ‘Norwich Canary’ is a stunning perennial from the Iridaceae (iris) family, native to South Africa. Renowned for its vibrant yellow, trumpet-shaped flowers that arch gracefully on slender stems, it brings a splash of sunshine to any garden. The genus name ‘Crocosmia’ derives from the Greek words ‘krokos’ (saffron) and ‘osme’ (smell), referencing the saffron-like scent emitted when dried flowers are placed in water. This plant is not only visually appealing but also attracts hummingbirds and butterflies, enhancing the biodiversity of your garden. Ideal for cut flower arrangements, its blooms have excellent longevity.

Soil type
Crocosmia ‘Norwich Canary’ thrives in well-drained, moderately fertile soil rich in organic matter. It prefers a slightly acidic to neutral pH ranging from 6.0 to 7.0. Incorporating compost or well-rotted manure can improve soil fertility and drainage.

Location and aspect
Plant in a location that receives full sun to partial shade, ensuring at least six hours of direct sunlight daily. An east or south-facing aspect is ideal. This will promote robust growth and abundant flowering. Shelter from strong winds to prevent damage to the tall flower stems.

Pest and disease problems
Generally pest-free, but occasionally susceptible to spider mites and thrips. Regular monitoring and applying insecticidal soap can manage these pests effectively. Overly wet conditions may lead to fungal diseases like rust or leaf spot. To prevent this, ensure good air circulation and proper soil drainage. Avoid overhead watering to minimize leaf wetness.

Propagation
Propagation is best done by division. In early spring or after flowering in late summer to early autumn, carefully lift the clump using a garden fork. Separate the corms, ensuring each division has healthy roots and at least one growth point. Replant the divisions at a depth of about 8 cm (3 inches) and space them 10-15 cm (4-6 inches) apart. Water well after planting. While seeds can be sown in spring, note that cultivars like ‘Norwich Canary’ may not come true from seed, and division is the preferred method to maintain cultivar characteristics.

Pruning, cutting back, and dividing
After the flowering period, cut back the spent flower stems to encourage the plant to direct energy back into the corms. Allow the foliage to die back naturally, as it continues to photosynthesize and strengthen the plant for the next season. Dividing the plant every 2 to 3 years prevents overcrowding and maintains vigor. Perform division during dormancy in early spring or late autumn.

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