Overview
Forsythia x intermedia 'Susan Gruninger' (v) is a bushy shrubs in the genus Forsythia, part of the Oleaceae family, with deciduous foliage. Forsythia x intermedia 'Susan Gruninger' (v) grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H5. Suggested uses include specimen shrubs and informal hedges.
About
Forsythia x intermedia 'Susan Gruninger' is a bushy deciduous shrub belonging to the Forsythia genus, known for its simple or sometimes lobed foliage. This cultivar produces abundant short tubular yellow flowers with four spreading lobes in early spring before the leaves emerge. It thrives in full sun or partial shade and is suitable for south-, west-, or east-facing aspects, tolerating both exposed and sheltered locations. Preferring fertile, moist but well-drained soil of various types and pH levels, it is hardy in the UK (H5) and is commonly used as a specimen shrub or in informal hedges.
Growing conditions
Best soil and position for Forsythia
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Forsythia x intermedia 'Susan Gruninger' (v) size, habit and characteristics
- Plant type
- Shrubs
- Habit
- Bushy
- Foliage
- Deciduous
- Suggested uses
- Specimen shrubs, Informal hedges
Care notes
Pruning and caring for Forsythia x intermedia 'Susan Gruninger' (v)
- Propagation
- Semi-hardwood cuttings
- Disease resistance
- Honey fungus, Forsythia gall
Frequently asked questions
Where is the best place to plant Forsythia x intermedia 'Susan Gruninger' (v)?
Forsythia x intermedia 'Susan Gruninger' (v) prefers full sun and partial shade. It suits exposed and sheltered positions.
What soil does Forsythia x intermedia 'Susan Gruninger' (v) need?
Forsythia x intermedia 'Susan Gruninger' (v) is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.
Is Forsythia x intermedia 'Susan Gruninger' (v) hardy in the UK?
Forsythia x intermedia 'Susan Gruninger' (v) has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Forsythia x intermedia 'Susan Gruninger' (v)?
Semi-hardwood cuttings.
More in the Forsythia genus
- Forsythia europaeaAlbanian forsythia
- Forsythia giraldianaGiraldi’s forsythia
- Forsythia ovata 'Naka?'
- Forsythia suspensa 'Decipiens'
- Forsythia suspensa 'Taff's Arnold' (v)
- Forsythia togashii
- Forsythia x intermedia 'Ashmount'
- Forsythia x intermedia 'Goldzauber'