Nemesia Aroma Rhubarb and Custard (Aroma Series)

RHS Plant Profile

nemesia [Aroma Rhubarb and Custard]

RHS / Joanna Kossak

Bedding Herbaceous Perennial

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A compact, bushy perennial to about 25cm, usually grown as a bedding plant. It has small, neat leaves and fragrant, bicoloured, purple and yellow flowers from late spring to early autumn

Position

Full sun

Soil Types

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

Loam Sand

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

Position

Full sun

Aspect: East–facing or 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): H3

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Scrophulariaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Nemesia can be annuals, perennials or sub-shrubs of bushy habit, with simple, opposite leaves and 2-lipped flowers in short racemes or solitary in the leaf axils
Name Status: Trade

How to Grow

Cultivation

Grow in moist but well-drained, fertile, ideally slightly acid, soil in full sun. Water well in dry spells to maintain flowering

Propagation

Take softwood cuttings from the ends of non-flowering shoots in late summer and overwinter in frost-free conditions or take softwood cuttings in spring

Suggested planting locations and garden types

City and courtyard gardens
Patio and container plants
Cottage and informal garden
Flower borders and beds

Pruning

Pinch out growing tips to produce bushy plants, and trim off flowering shoots when initial flowering is finished to promote more flowers

Pests

May be susceptible to aphids but generally pest-free

Diseases

May be susceptible to foot and root rots in wet soils but generally disease-free