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Dianella 'Blue Stream'® 17cm

Name: Dianella 'Blue Stream'® 17cm
Brand: Greenleaf Garden Center
SKU: Dianellablstream17cm
Price: 12.5 EUR
Availability: InStock

€15,00

€12,50

Quantity

Architectural evergreen foliage for outdoor spaces · Asphodelaceae

Dianella ‘Blue Stream’®

Heat, sun, drought — and it simply keeps looking good 🔥

Family: Asphodelaceae · Pot diameter: 17cm · Height: 30cm

Broad pale-blue leaves
Dense upright fan
Sun to light partial shade
Around 70 × 50cm

Dianella ‘Blue Stream’® brings a clear, luminous blue to the garden that ordinary evergreen foliage rarely achieves. Broad strap-like blades rise in vigorous fans and open gently outwards, creating a dense architectural mass without looking stiff. Repeated through a contemporary border, it establishes rhythm; used alone, it becomes a cool-coloured anchor that makes green, purple and silver planting appear richer and more deliberate.

Planted in a row beside a path, it creates a clear repeating rhythm; in a generous container, it becomes a complete architectural feature on its own. Its luminous blue visually cools stone, timber and dark-green foliage, while the broad blades add movement without losing their clean line. It is one of those plants that makes a space feel designed even without flowers.

What makes it special

Three defining traits of Blue Stream® explain why it stands apart from narrower-leaved or greener Dianella cultivars.

Broader, brighter blades

The notably broad leaves carry strong waxy bloom, producing a pale blue mass rather than a fine grey line.

Vigorous upright fans

New fans arise from the base and overlap into a substantial clump with a clear vertical rhythm.

Colour built for heat

The waxy surface helps the foliage retain its cool appearance in bright, warm planting once the plant is established.

Why you will love it: it delivers real scale and cool blue colour with the permanence of evergreen foliage and the clarity of a designed object.

In the garden & on the balcony Placement & plant combinations Give it abundant light, free drainage and enough room for its broad fans to be seen in full.

Planting position

A blue anchor in a warm garden

Use in full sun for the clearest blue, or bright partial shade in extremely hot reflected positions. It suits gravel planting, modern entrances, broad terrace pots and repeated drifts where its fans can be read individually.

Colour & compatibility

Blue with burgundy, silver and violet

Combine it with shapes that remain lower or broader and share its need for free drainage.

Tulbaghia violacea — fine violet flower stems add airy height and a warm contrast
Loropetalum chinense ‘Black Pearl’ — broad burgundy foliage makes the blue bloom look brighter
Helichrysum italicum — a low silver mound continues the cool palette at a finer scale

Care at a glance

Light

Full sun for the clearest blue or bright partial shade in fiercely hot reflected sites.

Watering

Water regularly until rooted, then deeply when the upper soil dries; avoid standing water.

Climate & hardiness

Handles heat and light frost to about −7°C, but needs protection from colder or prolonged freezes.

Safety

Possible berries are ornamental, not edible; keep them away from children and pets.

Detailed care Complete care guide Light, drainage, establishment, summer watering, container growing, feeding, grooming and winter protection

Light & orientation

In a mild coastal position it can take full sun. In a hot inland microclimate, a little afternoon shade can help, provided it still receives enough light to maintain its glaucous bloom.

Soil & drainage

Choose moderately fertile, well-aerated soil, from slightly acidic to neutral. Constant moisture around the base is far more dangerous than a brief dry spell.

Watering during establishment

During the first few months, water deeply when the surface begins to dry so that the whole root ball is moistened. Small daily doses do not encourage a deeper root system.

Watering once established

Once established, allow the top few centimetres to dry before watering again. Check more often during heatwaves and in containers, but never leave water standing in the saucer.

Growing in a container

Use a stable outdoor pot with clear drainage holes and an aerated growing mix. Move up in pot size gradually once the roots have filled the available space.

Feeding

One light application of a balanced slow-release fertiliser in spring is usually enough. Too much nitrogen softens the growth and blurs the cultivar’s clean outline.

Grooming the clump

Remove dry or damaged leaves individually from the base. Avoid cutting straight across the clump, which leaves every broad blade with an artificial flat top.

Winter protection

When severe frost is forecast, protect the roots and clump or move the pot to a bright, sheltered position. Keep the growing mix only just moist through winter.

Development over time From a basal fan to a broad glaucous clump The roots establish, side rosettes multiply, and the cultivar gradually develops its full mature spread.

Rooting in

The 30cm plant first secures its rhizomatous base and may show limited top growth.

Fan multiplication

New basal fans broaden the outline and strengthen the pale-blue vertical rhythm.

Mature clump

Over time the overlapping fans build an upright clump around 70 × 50cm.

Mature habit & dimensions

Mature plant

Height about 70cmSpread about 50cmBroad upright fans

Broad, wax-coated blades rise in overlapping fans from a compact rhizomatous base and arch only near their tips.

Form through time

Two realistic states

Young basal fansPossible warm-season flowers

Foliage-led formFresh fans thicken the base while the pale-blue blades remain the main display.

Warm-season possibilityAn established plant may lift a loose branched flower stem above the foliage, without losing its leaf-led structure.

Flowering varies with age and climate; the cultivar should be chosen for its foliage rather than a guaranteed floral display.

What to expect after planting: Establishment comes first. Over time the fans multiply and the clump approaches about 70cm in height and 50cm in spread; whether flowers are present on arrival depends on the plant’s age and the climate.

History & origin Cultivar origin A controlled Australian cross and the journey of ‘Proquest D5’

Graham Brown created Blue Stream® in New South Wales. In 2007 at West Pennant Hills he made a controlled cross between two selected Dianella breeding lines. A seedling with broader, strongly glaucous blades and vigorous upright growth was selected at Macquarie Fields in 2009 and named ‘Proquest D5’.

Repeated propagation confirmed its stable colour, leaf width and habit. It reached the Australian market in February 2012 and later European gardens. The same selection may appear as a hybrid within Dianella, be grouped with D. caerulea, or be sold under D. revoluta; these are different botanical placements for ‘Proquest D5’, not different plants.

Greenleaf for Plant Nerds Science nobody asked for Botanical details for anyone who wants to know what lies behind the plant’s appearance

Blue is heavy glaucous bloom

A strong wax layer scatters light above the green tissue, making the blade read as pale blue.

A strap with micro-armour

The slightly concave blade ends in a small point and carries weak marginal and midrib teeth, plus a coloured basal sheath.

Why its botanical name varies

The same ‘Proquest D5’ selection has been described as a hybrid within Dianella, grouped with D. caerulea, and sold under D. revoluta. These are different botanical placements, not different plants.

Frequently asked questions

Six practical answers about identity, mature size, sun, watering, flowering and winter protection.

01Is the foliage genuinely blue?

The tissue is green beneath a strong wax bloom that scatters light and produces the characteristic pale-blue appearance.

02How large does it become?

An established clump is expected to reach roughly 70cm high and 50cm wide.

03Will it flower?

It can produce loose blue flowers in a warm climate, but flowering is variable and not guaranteed.

04Can it grow in a pot?

Yes. Choose a broad, free-draining outdoor pot and divide or move it on when basal fans become crowded.

05How drought tolerant is it?

Once rooted it tolerates dry spells, but better foliage comes from a deep drink when the upper root zone dries.

06How should winter damage be handled?

Wait until frost risk eases, then remove only damaged blades at the base and preserve the healthy fans.

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Dianella 'Blue Stream'® 17cm

Dianella 'Blue Stream'® 17cm

Dianella ‘Blue Stream’®

What makes it special

Broader, brighter blades

Vigorous upright fans

Colour built for heat

A blue anchor in a warm garden

Blue with burgundy, silver and violet

Care at a glance

Light

Watering

Climate & hardiness

Safety

Light & orientation

Soil & drainage

Watering during establishment

Watering once established

Growing in a container

Feeding

Grooming the clump

Winter protection

Rooting in

Fan multiplication

Mature clump

Mature habit & dimensions

Form through time

Blue is heavy glaucous bloom

A strap with micro-armour

Why its botanical name varies

Frequently asked questions

Dianella 'Blue Stream'® 17cm — Care & Tips

We take care of the packaging!

With specially designed boxes, we ensure that the plants will reach you intact, no matter what they encounter on the way!

All plants in 3L pots or larger are placed in individual boxes that secure the plant at the base of the pot, preventing it from tipping over.

The cardboard used for the boxes is specially made to provide resistance to potential impacts during transport.

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