Forsythia × intermedia 'Spectabilis'

RHS Plant Profile
forsythia 'Spectabilis'

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forsythia 'Spectabilis' visionspictures.com
Shrubs
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A vigorous, deciduous shrub up to 3m high and 2m wide, with elongated, toothed, occasionally 3-lobed leaves. In early to mid-spring, bears a profusion of golden yellow flowers, 2-3cm across making it one of the most popular early-spring flowering shrubs

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
5–10 years
Max Spread
1.5-2.5 metres
Max Height
2.5-4 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Exposed or 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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Oleaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Forsythia are deciduous shrubs with simple, occasionally lobed, leaves and short tubular yellow flowers with 4 spreading lobes, borne profusely before the leaves in spring
Name Status
Accepted

How to Grow

Cultivation

Grow in moist but well-drained soil in sun or partial shade

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Low Maintenance
  • Banks and slopes
  • Flower borders and beds
  • Hedging and screens

Pruning

Pruning group 2

Pests

May be susceptible to birds eating the flower buds

Diseases

May be susceptible to honey fungus and forsythia gall