Lantana camara [Shamrock Rose Improved] ('Balshamrosim') (Shamrock Series)

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Synonyms

Lantana camara 'Balshamrosim'

RHS Recommended

Award of Garden Merit
Annual Biennial Shrubs

A vigorous, bushy, evergreen shrub to around 40cm tall with a branching habit, sometimes grown as an annual. The oval-shaped toothed foliage is dark green and slightly wrinkled with an unpleasant scent when crushed. Dense heads of rounded, golden-yellow to creamy-orange flowers mature to shades of rose, salmon and dark pink from late spring into summer and through to the first frosts. Great for patio containers and hanging baskets or as ground cover in beds and borders. Heat and drought-tolerant once established

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 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 sun
Aspect
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)
H1C
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Verbenaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling Pets (dogs, rabbits, rodents): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Lantana can be evergreen shrubs or perennials, with simple, often wrinkled leaves, and domed terminal clusters of small, salver-shaped flowers
Name Status
Trade

How to Grow

Cultivation

Grow outdoors in fertile, moist but well-drained soil in full sun in frost-free conditions. Grow under glass in a peat-free, loam-based compost in full light. Protect from frost. See Lantana trial results 2025

Propagation

Propagate by semi-ripe cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Hanging Basket
  • Patio and container plants
  • Flower borders and beds
  • Ground cover
  • Wall side borders

Pruning

pruning group 9. deadhead regularly

Pests

May be susceptible to glasshouse whitefly and glasshouse red spider mite

Diseases

May be susceptible to Powdery mildews when grown under glass