Lamium galeobdolon

RHS Plant Profile

yellow archangel

Other common names

weasel's snout, yellow deadnettle

Synonyms

Lamiastrum galeobdolon
Lamium luteum
Galeobdolon luteum

Herbaceous Perennial

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A European native wildflower, a deciduous perennial to 60cm tall, bearing toothed mid-green leaves in pairs on square stems. Yellow flowers are borne in whorls in the leaf axils in early summer. Like other deadnettles, flowers are lipped and hooded

Position

Full shade, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full shade Partial shade

Aspect: North–facing or West–facing or East–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: Yes
Foliage: Deciduous
Habit: Matforming
Genus: Lamium can be annuals or, more usually, perennials, with coarsely toothed ovate leaves and 2-lipped, tubular flowers borne in whorls forming a short spike
Name Status: Correct
Plant Range: Europe, W Asia

How to Grow

Cultivation

In the wild it grows along hedgerows, in grassy banks or in woodland and coppice, so is best suited as groundcover in a wild or woodland garden situation. Has the potential to become a nuisance if not managed well

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Wildlife gardens
Wildflower meadow

Pruning

Cut back at the end of the season or to tidy up straggly plants

Pests

Generally pest-free

Diseases

Generally disease-free