Chrysanthemum 'Robeam' (9c) | chrysanthemum 'Robeam'

RHS 1999

Synonyms

Dendranthema 'Robeam'

Conservatory Greenhouse Herbaceous Perennial

Grows to 1.2m, with long stems bearing sprays of vivid light yellow flowers to 7cm across in late summer and autumn

Position

Full sun

Soil Types

Loam

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 1–2 years
Max Spread: 0.5-1 metres
Max Height: 1-1.5 metres

Growing Conditions

Loam

Moisture: Moist but 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): H2

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Skin allergen. Wear gloves and other protective equipment when handling
Genus: Chrysanthemum are erect woody-based perennials with aromatic, pinnately lobed leaves and flowerheads of diverse form, from late summer to late autumn
Name Status: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: Reflexed Indoor Spray chrysanthemums have branched stems bearing several fully double flowerheads with recurved florets

How to Grow

Cultivation

Grow in a cold frame in a peat-free, loam-based potting compost and move into a warm glasshouse in early autumn. Provide bright filtered light with good ventilation and a minimum temperature of 10°C. During the growing season water moderately and apply a balanced liquid fertiliser weekly

Propagation

Propagate by rooting softwood cuttings in peat-free potting compost at 16°C in spring. Pot on rooted cuttings in late June to early July into 23cm pots and pinch out as soon as established

Suggested planting locations and garden types

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

Pruning

Pinch out growing tips and disbud as required

Pests

May be susceptible to leaf and bud eelworms, aphids, glasshouse whitefly, glasshouse red spider mite and capsid bug

Diseases

May be susceptible to glasshouse grey moulds, powdery mildews and chrysanthemum white rust