Muscari 'Big Smile'

RHS Plant Profile

grape hyacinth 'Big Smile'

RHS

Synonyms

Muscari armeniacum 'Big Smile'

Bulbs

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A deciduous, bulbous perennial, to 18cm tall, with green, strap-shaped foliage and, in spring, dense spikes of relatively large blue flowers rimmed with white

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0-0.1 metre

Size

Time to Maturity: 2–5 years
Max Spread: 0-0.1 metre
Max Height: 0.1-0.5 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or East–facing or North–facing or West–facing
Exposure: Exposed or Sheltered
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): H6

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asparagaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy, Clump forming
Potentially harmful: Ornamental bulbs - not to be eaten. Wear gloves and other protective equipment when handling Pets: Ornamental bulbs - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Muscari are bulbous perennials with linear or strap-shaped leaves and small bell-shaped, tubular or urn-shaped flowers borne in a dense raceme on an erect leafless stem
Name Status: Accepted

How to Grow

Cultivation

Plant 10cm deep in groups, in moderately fertile, moist, but well-drained soil in full sun. To retain vigour, lift congested clumps and divide when dormant in autumn. See https://www.rhs.org.uk/plants/trials-awards for further information about RHS plant trials and awards

Propagation

Separate offsets in summer or propagate by seed, sown in autumn, in containers in a cold frame; cultivars may not come true from seed

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
City and courtyard gardens
Coastal
Gravel garden
Rock garden
Banks and slopes
Flower borders and beds
Cut flowers

Pruning

No pruning required, but remove spent foliage and cutting back in autumn may be needed

Pests

Generally pest-free

Diseases

May be susceptible to fungal infections including anther smuts and bluebell rust (see rust diseases), and bacterial soft rot and some virus diseases