Euphorbia helioscopia

RHS Plant Profile
sun spurge
sun spurge John Fielding

Other common names

cat's milk, churn staff, little good, little goody, mad woman's milk, mare's milk, mouse milk, wart grass, wartwort, llaeth ysgyfarnog

Plants for pollinators
Annual Biennial

A native, annual, deciduous weed producing upright stems, approximately 30-45cm 12-16in) high, branching towards the top, wth green, oval leaves and terminal clusters of small, insignificant yellow-green flowers from mid-spring to summer. The plant commonly occurs on cultivated fields, garden borders, allotments and waste ground, where seed can remain viable for a number of years, before being brought to the surface by digging or soil disturbance, where they will then germinate.

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness
H7
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Euphorbiaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Humans/Pets: IRRITANT to skin/eyeharmful if eaten. Wear gloves and other protective equipment when handling. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Euphorbia can be annuals, perennials, shrubs or succulents, with milky sap and small flowers held within cupped, often colourful bracts
Name Status
Correct

How to Grow

Cultivation

Grows best in moist, but well-drained soil, or dry soil in full sun. See Euphorbia for further advice

Propagation

Propagate by seed

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Mediterranean climate plants
  • Wildlife gardens
  • Flower borders and beds

Pruning

Remove plants after flowering in autumn

Pests

Generally pest-free

Diseases

May be susceptible to rust diseases