Dianella Clarity Blue Care: Everything You Need to Know

The Dianella Clarity Blue boasts its big, beautiful blue flowers that are simply stunning. A succulent plant, this makes it an excellent container plant.

This tough hybrid of Dianella which is a cross between Cassa Blue and Utopia is distinct for its upright blue foliage that is strap-like in form. It is a clumping plant that can reach up to 21 inches in height. Being evergreen, it has the ability to maintain its foliage all year-round.

Read more to find out everything you need to know about the Dianella Clarity Blue.

dianella clarity blue

Botanical Name Dianella hybrid
Common Name Dianella Clarity Blue, Flax Lily Clarity Blue
Plant Type  Perennial
Flower Color Blue
Size When Mature 21 Inches
Bloom Time Spring
Sun Requirements Full Sun to Partial Shade
USDA Hardiness Zones 8 – 10
Soil PH Range 5.0-7.5
Soil Type Well-draining, clay, loam
Water Needs Medium
Native Area Australia

What You Need to Know About Dianella Clarity Blue

Its foliage has a green-blue color that is very unique. Interestingly, the blue color of the leaves is more apparent when they are grown in full sun. Many people who are looking to adding some blue hues to this garden won’t be disappointed with this plant.

The flowers are strap leaf and narrow and appear in clusters and bloom from spring to summer. This is soon followed by the appearance of blue to purple berries.

The Dianella Clarity Blue is an easy plant to care for. It is drought tolerant and can survive in harsh conditions.

When it comes to maintenance, it is considered to be low-maintenance because of its slow growth. All you need to do is trim it back every now and then to keep it looking tidy. You can also divide the clumps to help them spread out. If you’re looking to add some color to your garden with minimal effort, you can never go wrong with Dianella Clarity Blue.

How to Care for Dianella Clarity Blue

Here’s everything you need to know about growing and caring for a thriving Dianella Clarity Blue:


One of the common dilemmas many growers have when it comes to choosing flowering plants is getting those that will bloom in shady areas. Well, you can put your worries to rest because Dianella Clarity Blue will do just fine in partial shade to full sun.

Its versatile nature makes it possible to grow either in full sun or partial shade, allowing everyone to have a go at it irrespective of the lighting conditions in their garden.

If you choose to grow it as a houseplant, it should be rotated every few days to ensure that all parts of the plant get some light.

Water and Soil Needs

This plant is famous for being drought-tolerant and can survive in harsh conditions. It is a great choice for those who live in areas with little rainfall. However, it is still important to water it regularly, especially during the hotter months.

When it comes to soil, it prefers well-drained soils to clay loam soils with a pH of 5.0 to 7.5.

Temperature Requirements

dianella clarity blue

This plant is frost-tolerant and drought tolerant at the same time so it is definitely living up to its description of a tough plant. Their pretty foliage and blooms make them a sight to behold all year-round. The Dianella Clarity Blue thrives in USDA zones 8-10.


The best fertilizer to use on a Dianella Clarity Blue is a slow-release fertilizer. Although it doesn’t heavily rely on fertilizer for it to thrive, a light feeding can give the plant a boost of energy and help it to produce more flowers.

Remember, fertilize this lightly and avoid overdoing it. You don’t want to end up burning the roots of your Dianella Clarity Blue.

Common Diseases 

This plant is relatively resistant to pests and diseases. However, it is still important to keep an eye out for insects like aphids, mealybugs, and whiteflies. These insects can infest the plant and suck out its nutrients. If you notice any of these pests on your plant, it is important to act quickly and remove them before they have a chance to do too much damage.

Aside from pests, root rot is also a common problem with Dianellas. Since they like well-drained soils, make sure that the pot you’re using has good drainage. If not, the roots will start to rot causing the demise of the plant.

Prevention is always better than cure so make sure that you’re using the right pot, soil, and watering frequency to avoid this problem altogether.

Dianella Clarity Blue Propagation

Propagation can be done by seed, division, or cuttings.

If you choose to propagate by seed, it is best to sow the seeds thinly. Make sure to plant the seeds in well-drained soil and keep them moist until they germinate. Once they have germinated, you can transplant them into individual pots.

To propagate by division, divide the clumps in spring or autumn. Replant the divisions in well-drained soil and water them regularly until they have established themselves.

Cuttings can be taken from new shoots in spring or summer. Cuttings should be about 4 inches long and should be planted in well-drained soil.