Saxifraga bronchialis (10)

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Alpine Rockery Herbaceous Perennial

An evergreen perennial rock plant forming a dense mat of fleshy dark green leaves up to 15cm in height, varying in shape from narrow with pointed tips to softly hairy, rounded and spoon-shaped. Showy cream flowers with red, yellow or purple spots appear from June through to August

Position

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
Well–drained
pH
Alkaline or Neutral

Position

Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
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
Evergreen
Habit
Matforming
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
Correct
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

Trachyphyllum saxifraga are a small group of mat-forming evergreen alpines with bristly edges and small, white or yellow flowers on short stems
Plant Range
North America, N Asia

How to Grow

Cultivation

Grow in well-drained, gritty soil in full sun or dappled shade

Propagation

Propagate by cuttings of non-flowering side shoots in spring to late summer, or by division. Difficult to grow from seed

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Rock garden
  • Flower borders and beds
  • Ground cover

Pruning

No pruning required

Pests

May be susceptible to aphids, slugs, vine weevil and glasshouse red spider mite

Diseases

Generally disease-free