Overview

Dianella caerulea Cassa Blue ('Dbb03'PBR) is a tufted, clump forming herbaceous perennial in the genus Dianella, part of the Asphodelaceae family, with evergreen foliage. It typically grows around 0.5-1 metres tall and 0.1-0.5 metres wide, reaching full size in around 2-5 years. Dianella caerulea Cassa Blue ('Dbb03'PBR) grows best in full sun and partial shade, and tolerates loam and sand soils and neutral and acid pH. Its UK hardiness is rated H3. Suggested uses include coastal, patio and container plants, city and courtyard gardens, cottage and informal garden and flower borders and beds.

About

Dianella caerulea Cassa Blue ('Dbb03'PBR) is a cultivar of flax lily, a grass-like herbaceous perennial in the Asphodelaceae family. It forms evergreen, tufted clumps reaching between 0.5 and 1 metre in height with a spread of 0.1 to 0.5 metres, taking 2 to 5 years to reach full size. This cultivar thrives in full sun or partial shade, favouring south- or west-facing aspects and can tolerate both exposed and sheltered conditions. It prefers well-drained loam or sandy soils with neutral to acidic pH, and is of interest during the summer and winter seasons.

About the genus

Dianella is a genus of about forty species of flowering plants in the monocot family Asphodelaceae, commonly known as flax lilies. Plants in this genus are tufted herbs with more or less linear leaves and bisexual flowers with three sepals more or less similar to three petals and a superior ovary, the fruit a berry. They occur in Africa, South-east Asia, the Pacific Islands, New Zealand and Australia.

Wikipedia contributors, "Dianella (plant)", CC BY-SA 4.0 — Dianella (plant)

Growing conditions

Best soil and position for Dianella

Sunlight

Full sun, Partial shade

Soil type

Loam, Sand

Soil pH

Neutral, Acid

Soil moisture

Well-drained

Aspect

South-facing, West-facing

Exposure

Exposed, Sheltered

UK hardiness

H3

Plant details

Dianella caerulea Cassa Blue ('Dbb03'PBR) size, habit and characteristics

Plant type

Herbaceous Perennial, Grass Like

Habit

Tufted, Clump forming

Foliage

Evergreen

Height

0.5-1 metres

Spread

0.1-0.5 metres

Time to full height

2-5 years

Suggested uses

Coastal, Patio and container plants, City and courtyard gardens, Cottage and informal garden, Flower borders and beds

Care notes

Pruning and caring for Dianella caerulea Cassa Blue ('Dbb03'PBR)

Propagation

Seed, Division of rhizomes

Pest resistance

Generally pest-free

Disease resistance

Generally disease-free

Frequently asked questions