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Products > Dianella tasmanica
 
Dianella tasmanica - Tasman Flax Lily
   

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Habit and Cultural Information
Category: Grass-like
Family: Phormiaceae (~Xanthorrhoeaceae)
Origin: Australia (Australasia)
Evergreen: Yes
Flower Color: Dark Blue
Bloomtime: Spring
Height: 2-3 feet
Width: Spreading
Exposure: Light Shade/Part Sun
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 20-25 F
Dianella tasmanica (Tasman Flax Lily) - A beautiful strap-leafed perennial with clumps to 30 inches tall bearing fans of rich green leaves that are finely serrated along the leaf margins. This plant spreads by rhizomes and in the right situation can rapidly colonize a planter bed. It has rich blue flowers with prominent brown-tipped golden anthers in the spring that are followed by slightly oblong attractive deep metallic-blue berries in mid-summer. It grows rapidly in coastal full sun with regular irrigation but is more useful (and contained) in part sun with only occasional to infrequent irrigation and in these shady locations can go prolonged periods unirrigated. It is hardy to about 20 F. This plant is sometimes thought of as invasive but this is typically in a well or over irrigated gardens but it is extremely useful in dry shade where it imparts a somewhat tropical look. Its foliage, flowers and berries can all be used in flower arrangements. This species was first collected in Tasmania in 1837 where it generally grows in moist wooded forests but it is also found along the coast of New South Wales. It was described by the English botanist Joseph Hooker in 1858. The genus is named after Diana, the Roman goddess, of hunting and Queen of the woods and the specific epithet references the first collection of this plant in Tasmania. This plant also has the common name Flax Lily and Blue Berry Flax Lily. These common names come from the durable leaves that can be woven for basketry and other purposes. Though some claim the fruit is edible and tastes somewhat like grapes, it is listed elsewhere as poisonous - the listing in Poisonous Plants of California by Thomas Fuller and Elizabeth McClintock (UC Press, 1986) notes ht there have been no reported poisonings involving Dianella in California but "in Australia and New Zealand this and other species of Dianella have been suspected of poisoning livestock and humans, but reports are circumstantial and inconclusive." For this reason we do not recommend eating the berries of this plant.  The information on this page is based on our library and online research as well as observations made of this plant as it grows in our nursery, in the nursery garden and in other gardens that we have visited. We have also incorporated comments received from others and always appreciate getting feedback of any kind from those who have some additional information, in particular if this information is contrary to what we have written or includes additional cultural tips that would aid others in growing Dianella tasmanica.
 
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