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Dianella 'Cassa Blue'

Dianella 'Cassa Blue' bears spikes carrying delicate, light blue flowers, which are followed by small, blue berries in summer. These are held neatly above the blue-green leaves as it grows to 80 cm tall and the same width. Dianella 'Cassa Blue' is an easy-to-grow plant that is ideal for planting under existing trees and shrubs, including in cottage gardens, planting around outdoor living areas, or maintaining in a container.

Dianella caerulea 'Cassa Blue' plants with blue-green foliage.

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Suited to regions:All regions
Plant type:Flaxes
Height:80 cm
Spread:80 cm
Flowering time:Spring
Tolerances:Coastal, Extended dry periods, Hardy, Wind
Garden uses:Borders, Containers, Living areas, Paths & Steps, Ponds, Pool areas
Garden styles:Architectural, Backyard, City & Courtyard, Coastal, Frontyard, Japanese, Mediterranean, Modern
Easy to grow?Yes
Maintenance requirementsLow
Growth rateMedium
Also known as
Sku13409

How to grow Dianella 'Cassa Blue' in NZ

Growing Dianella 'Cassa Blue' in New Zealand is easy and rewarding. It thrives in sunny to partly shaded sites with free draining soil. This hardy variety tolerates light frost and dry conditions once established, making it well suited to many regions. For best results, improve soil with organic matter at planting and water regularly while young. Once settled, it requires minimal care and delivers consistent, long lasting performance in a wide range of garden settings.

Dianella 'Cassa Blue' care tips

Caring for Dianella 'Cassa Blue' is simple and helps maintain its striking appearance. Remove any old or damaged leaves to encourage fresh growth and keep the clump tidy. An annual application of slow release fertiliser in spring supports healthy foliage and flowers. While tolerant of dry spells, occasional deep watering in extended hot periods keeps the plant looking lush. Its resilience and low maintenance nature make it a popular choice for busy gardeners and landscapers.

Dianella 'Cassa Blue' size, spacing, and growth rate

Dianella 'Cassa Blue' grows as a tidy clump about 40 cm tall and 40 to 50 cm wide. Its compact form makes it ideal for small gardens, edging, and container planting. For mass planting, space 40 to 50 cm apart to create full coverage. Growth is moderate, with plants establishing well within a season. Its consistent shape and size ensure it delivers reliable structure and colour across both residential and commercial landscapes.

Landscaping uses for Dianella 'Cassa Blue'

Dianella 'Cassa Blue' is a standout in landscaping for its bold foliage colour and neat habit. It is excellent for edging paths, lining driveways, or creating low maintenance borders. The unique blue tones provide contrast when combined with green or silver foliage plants. It also works beautifully in pots and planters, adding year round style to courtyards and patios. Whether used in mass plantings or as a feature, it offers reliable colour and texture with minimal upkeep.

Why buy Dianella 'Cassa Blue' from The Plant Company?

Buying Dianella 'Cassa Blue' from The Plant Company guarantees premium quality plants grown in New Zealand conditions. As NZ’s most trusted plant nursery, we supply strong, healthy plants that establish quickly and perform reliably in your garden. Customers value our expertise, fast nationwide delivery, and careful packaging. When you choose The Plant Company, you can be confident your Dianella 'Cassa Blue' will arrive in excellent condition and deliver lasting beauty to your outdoor spaces.

Questions and Answers

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