• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Lamium galeobdolon 'Florentinum' (v)

yellow archangel 'Florentinum'

  • Other common names yellow archangel 'Florentinum'

  • Synonyms Galeobdolon argentatum
    Galeobdolon luteum 'Variegatum'

    Lamiastrum galeobdolon subsp. argentatum
    Lamium galeobdolon subsp. montanum 'Florentinum'
    Lamium galeobdolon 'Variegatum'

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  • Family Lamiaceae

  • 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

  • Details 'Florentinum' is a stoloniferous perennial that forms mats of green leaves marked with silver variegation. In early summer, flowering stems bear whorls of hooded, yellow flowers in the leaf axils. Reaches a height of around 60cm

Characteristics

  • Foliage Deciduous

  • Habit Mat forming

  • 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

Sunlight

  • Partial Shade

  • Full Shade

  • Aspect North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • Clay

    Clay

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Chalk, Loam, Clay

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Suited to a woodland garden situation where its potentially spreading nature will not be a problem. Will grow in shade and quite dry conditions

Propagation Propagate by division in spring

Suggested planting locations and garden types Ground Cover Underplanting of Roses and Shrubs Wildflower meadow Wildlife Gardens

How to care

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

Pests Generally trouble free

Diseases Generally trouble free

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