Saxifraga 'Mount Nachi' (_fortunei_) (5)

RHS / Joanna Kossak

Herbaceous Perennial

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'Mount Nachi' is a clump-forming perennial growing to 25cm tall. The lobed leaves are bronze and green on the upper surface, a reddish-purple colour on the underside and covered with fleshy red bristles. Creamy-white flowers are borne on short stems in autumn

Position

Full shade, Partial shade

Soil Types

Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Loam Sand

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

Position

Full shade 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): H4

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Saxifragaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Saxifraga can be annuals, biennials, evergreen or herbaceous perennials, mostly mat-forming in habit, with simple or palmately lobed leaves and starry or rounded flowers which may be solitary of in panicles or cymes
Name Status: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: Irregulares section saxifrages are shade-tolerant, usually herbaceous perennials forming rosettes broad, palmately lobed leaves, with leafless stems bearing lax panicles of small flowers with short upper, and longer lower petals, in summer or autumn

How to Grow

Cultivation

Grow in well-drained, moist, humus-rich soil in deep or partial shade

Propagation

Propagate by division in spring

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Rock garden
Flower borders and beds
Garden edging

Pruning

No pruning required

Pests

Generally pest-free but may be susceptible to slugs and vine weevil

Diseases

Generally disease-free