Scientific Name:
Forsythia
x
intermedia
cvs.
Pronunciation:
for-SYE-thee-uh ex in-tur-MEE-dee-uh
Common Name:
showy forsythia
Family Name:
Oleaceae
Plant Type:
Flowering cut plant, Shrub - deciduous
Key ID Features:
Shrub dense; leaves opposite, ovate to lanceolate, most blades 7-10cm long x 3-5cm wide, margins serrate midway towards apex; flowers 1.5-2cm wide, four deep bright yellow petals, Mar-Apr. Winter ID: buds greenish divergent; lenticels bumpy on older stems and trunks; young stems yellow-green before maturing to orange-brown.
Habit:
Arching, Stiffly upright
Form:
Irregular, Vase
Texture:
Medium - fine
Mature Height:
2 - 3m
Mature Spread:
3 - 4m
Growth Rate:
Fast
Origin:
Garden origin (F. suspensa x F. viridissima)
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun, Filtered shade
Soil/Growing Medium:
Well-drained
Water Use:
Low
Landscape Uses:
Cut flower or foliage, Group or mass planting, Mixed shrub border, Sheared hedge, Spring interest, Tall background
Additional Info:
Google. Cultivars shown or on campus include F. 'Lynwood'.
Leaf Morphology:
Form:
Simple
Arrangement:
Opposite
Texture/Venation:
Soft flexible, Pinnate venation
Surfaces:
Glabrous
Shapes:
Lanceolate, Ovate
Apices:
Acute
Bases:
Cuneate
Margins:
Serrate
Additional Info:
Spectacular fall colour
Inflorescence Type:
Flowers solitary, Floriferous
Flower Morphology:
Flowers perfect
Number Of Petals:
4
Corolla Shape:
Salverform
Ovary Position:
Superior
Colour (petals):
Showy, Yellow
Flower Scent:
Fragrant
Flower Time at Peak:
Mar, Apr
Additional Info:
One of the most noticeable spring flowering shrubs. Flower buds less hardy than rest of plant.
Fruit Type:
Capsule
Fruit Colour:
Brown
Fruiting Time:
Sep, Oct
Additional Info:
Fruit insignificant
Bark Morphology:
Prominent lenticels, Multi-stem trunk
Bark or Stem Colour:
Brown
Leaf Bud Type:
Superposed
Propagation:
Greenwood cuttings, Softwood cuttings, Hardwood cuttings, Layering
Maintenance:
High
Other:
needs frequest pruning
Pest Susceptibility:
Bacterial leaf spot, Dieback, Fungal leaf spot, Galls, Nematodes, Root rot, Virus (Deer resistant)
Course(s):
- AARB 1012
- HORT 1155
- Level 1 Apprenticeship
Location(s):
- (ONW) Overpass North side West : 810 cv. ‘Lynwood’
- (WDH) Wark-Dumais House : 195