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Syringa sp. – Lilac

Sought after for their upright, highly fragrant flower heads, Lilac is a lovely addition to cool climate gardens.


Botanical name

Syringa sp.

Common name

Lilac, Common Lilac

Lilac description

Originating from north-eastern Asia and Europe, Syringa is a genus of deciduous shrubs and small trees.

During Spring, Lilacs are prized for their eye-catching, highly fragrant flower heads that may be white, lilac, pink, purple or even red in colour. Many cultivars of the most commonly grown Syringa vulgaris are available in single and double-flowering forms (not all being fragrant).

They grow anywhere from 2m to 5m in height depending on the species and can form a shrubby or small tree-like growth habit with oval or heart-shaped, mid green leaves.

Climate

Cool

Plant cultivation and care

Lilac performs best in cool, moist climates in a full sun or light shade position in the garden. They prefer well-drained humus rich soil quite high in lime. Give plenty of water during warmer months and protect from winds.

Propagate from cuttings or suckers. Seed can produce sub-standard plants.

Plant use

Shrubberies, perfumed gardens, cottage gardens

Pruning

Remove flower heads as soon as they begin to die off in order to encourage an abundance of flowers next season.

Pests and diseases

Can suffer from Bacterial Leaf Spot which presents as brown, watersoaked spots on leaves and young shoots. Syringa vulgaris is affected, particularly the white flowering varieties.

To control, prune off affected areas and destroy. Avoid fertilisers high in nitrogen. If necessary, Copper oxychloride can be used as a chemical control. Discuss this with your local nursery/horticulturist.