Argyranthemum Madeira Crested Merlot ('Bonmadmerlo') (Madeira Series) (d)

RHS Plant Profile

marguerite [Madeira Crested Merlot]

Synonyms

Argyranthemum 'Bonmadmerlo'
Argyranthemum Madeira Double Red

Shrubs Annual Biennial

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A tender, evergreen sub-shrub which can be grown as an annual. It has dark red flowers with pale centres during the summer months, and finely dissected, blueish-green scented leaves.

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: 1–2 years
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 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): H2
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy, Columnar upright
Genus: Argyranthemum are evergreen woody-based perennials or sub-shrubs, with simple or pinnately dissected leaves and white, yellow or pink, daisy-like flower-heads from late spring to autumn
Name Status: Trade

How to Grow

Cultivation

Grow in moderately fertile, well-drained soil in full sun. Deadhead regularly to prolong flowering and pinch growing tips to keep compact. Mulching may protect rootstock from frost, and helps to conserve water. Water in prolonged dry spells

Propagation

Root softwood cuttings in spring, and semi-hardwood cuttings of non-flowering shoots at other times

Suggested planting locations and garden types

Patio and container plants
City and courtyard gardens
Coastal
Cottage and informal garden
Flower borders and beds
Garden edging
Cut flowers

Pruning

Deadhead regularly, pruning group 10

Pests

May be susceptible to leaf miners

Diseases

May be susceptible to Crown Gall