Hemerocallis 'Arctic Snow'

RHS Plant Profile

daylily 'Arctic Snow'

Herbaceous Perennial

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A clump-forming herbaceous perennial with narrow, upright leaves and an overall height of about 60cm. The flowers are 15cm wide, ivory with a green throat, in mid-summer

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full sun

Aspect: West–facing or South–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

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asphodelaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: TOXIC to pets (cats) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Hemerocallis may be evergreen or herbaceous perennials, with narrow, strap-shaped leaves and funnel-shaped flowers on erect stems in late spring or early summer
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile, moist but well-drained soil, best for flowers in full sun, they are tolerant of light shade. Mulch in late autumn or spring and water freely from spring until buds develop. Dry conditions and excessive shade will reduce flowering. See Hemerocallis cultivation

Propagation

Propagate by division in late summer or autumn

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Coastal
Flower borders and beds

Pruning

Tidy plant after flowering

Pests

May be damaged by hemerocallis gall midge, earwigs, thrips, slugs and snails

Diseases

Generally disease-free, but may be susceptible to fungal leaf spot and rust diseases or bacterial leaf and stem rot