Daphne petraea 'Tremalzo'

RHS Plant Profile
daphne 'Tremalzo'

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daphne 'Tremalzo' RHS 1999

Synonyms

Daphne petraea 'Alba'

Shrubs

A very slow-growing dwarf evergreen shrub to 10cm tall, with narrow, dark green leaves and pure white flowers with a tiny yellow eye, opening in late spring

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity
10–20 years
Max Spread
0.1-0.5 metres
Max Height
Up to 10 cm

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing or East–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

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Thymelaeaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
TOXIC if eatenskin irritant. Wear gloves and other protective equipment when handling TOXIC to pets - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus
Daphne can be deciduous or evergreen shrubs with small, usually very fragrant tubular, 4-lobed flowers, often followed by colourful berries
Name Status
Accepted

How to Grow

Cultivation

A choice shrublet, ideal for an alpine house or scree. Grow in moderately fertile, well-drained soil in sun or partial shade. Mulch to keep roots cool. Resents transplanting. Further daphne cultivation advice

Propagation

Take softwood cuttings in early summer and semi-ripe cuttings in late summer

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Gravel garden
  • Rock garden
  • Flower borders and beds

Pruning

Pruning group 1 or pruning group 8 but keep pruning to a minimum

Pests

May be susceptible to aphids

Diseases

May be susceptible to honey fungus (rarely), phytophthora root rot, fungal leaf spot and virus diseases