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Frangula alnus 'Fine Line' (Alder buckthorn 'Fine Line')

Other names: Frangula alnus 'Ron Williams', Fern leaf buckthorn 'Fine Line', Rhamnus frangula 'Fine Line', Rhamnus frangula 'Ron Williams'

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Variety or Cultivar
'Fine Line' is a columnar, slow-growing, deciduous shrub with linear, fern-like, mid-green leaves turning yellow in autumn, and, in late spring and early summer, clusters of small, green flowers followed by spherical, fleshy, red fruit ripening black.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
2.5 m 1 m 20-50 years
8 ft 3 ft 20-50 years

Where to grow

Soil type
  • Chalky
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Sun
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Grows in moderately fertile, moist but well-drained soil in sun or partial shade. Suitable for use as a hedge or for attracting wildlife. Considered an invasive species in many areas of North America.

Suggested uses

Beds and borders, Hedging/Screens, Low Maintenance, Wildflower, Wildlife

UK hardiness

H7

USDA zones

Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8

Sunset zone

4, 5, 6, 7, 10, 11, 1, 2, 3

WUCOLS

North-Central Coastal = Low
Central Valley = Low
South Coastal = Very Low
South Inland = Low
High and Intermediate Desert = Inappropriate
Low Desert = Unknown

Foliage

Deciduous

Habit

Narrowly columnar

Native to

Garden origin

Drought tolerant

No

Flood tolerant

Yes

Toxicity

Fruit is toxic.

Plant care

Pruning

Pruning group 1

Propagation methods

Seed, Semi-hardwood cuttings

Pests

Generally pest free.

Diseases

Generally disease free.

Prune initially when winter planting

Summer trim laterals in first year of planting

Clip hedge to desired shape (optional)

Selective pruning only (only if needed)

Take semi-hardwood cuttings in late-summer

Plant in moist but well-drained soil (autumn or spring)

Plant in full sun or partial shade (autumn or spring)

Sow seeds in a cold frame in autumn

Other plants

Plants in this Genus (0)

Frangula

Companion plants (0)

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