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Shrubs

Yucca rostrata 'Sapphire Skies'

beaked yucca 'Sapphire Skies'

A slow-growing, tree-like shrub to 5m in height, usually single-trunked and unbranched, the trunk covered with soft, grey fibrous remains of old leaf bases. Produces spine-tipped silvery-blue leaves to 60cm long, with thin yellow margins, and white flowers to 5cm long, within or just above the leaf rosette in summer

Synonyms

Yucca 'Sapphire Skies'

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Plant nurseries
4 suppliers

Ultimate height

2.5–4 metres

Time to ultimate height

10–20 years

Ultimate spread

1.5–2.5 metres

Chalk

Loam

Sand

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Sheltered

Drought resistance

Yes

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Asparagaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Tufted
Potentially harmful: Skin allergen. Wear gloves and other protective equipment when handling Pets (dogs, cats): Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Yucca can be evergreen perennials, shrubs or trees, with dense or loose rosettes of stiff, sword-shaped leaves and tall panicles of bell-shaped flowers
Name status: Accepted

How to grow

Cultivation

Grow outdoors in neutral to alkaline, well-drained soil in a hot, sunny, sheltered position. See yucca cultivation for further advice

Propagation

Propagate by seed, flowers may require hand-pollination to set seed; or remove rooted suckers

Suggested planting locations and garden types

Architectural
City and courtyard gardens
Coastal
Cottage and informal garden
Gravel garden
Mediterranean climate plants
Low Maintenance

Pruning

No pruning required, remove spent flowering stems

Pests

May be susceptible to aphids on flower spikes, and snails

Diseases

May be susceptible to yucca leaf spot

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