Zinnia Giant Dahlia mixed

RHS Plant Profile
zinnia [Giant Dahlia] mixed
Annual Biennial

A bushy, half-hardy annual, with very large semi-double flowers in bright shades of red, pink, yellow and orange; produced on long stems up to 90cm (36in) high, This makes them ideal for growing for cut flowers and for the wildlife garden, where they will be attractive to pollinators such as bees and butterflies.

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
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
Genus
Zinnia can be annuals, perennials or sub-shrubs, with branching stems bearing opposite leaves and solitary terminal flower-heads in summer
Name Status
Trade

How to Grow

Cultivation

Grow in well-drained, fertile, humus-rich soil in a warm, sunny position

Propagation

Propagate by seed sown in pots in spring or, in warm areas, sown in situ in late spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Wildlife gardens
  • Bedding
  • Cut flowers
  • Flower borders and beds
  • Wall side borders

Pruning

Deadhead to prolong flowering

Pests

Generally pest-free

Diseases

May be susceptible to foot and root rot, grey moulds, fungal leaf spot and powdery mildews