Large shrub
Common lilac
Syringa vulgaris
A flowering shrub for screens, informal hedges and classic garden compositions.
Planning parameters
Use these values as a practical planning envelope: they describe the adult plant, not the young seedling.
- Adult height
- 2.5-4 m
- Crown diameter
- 3 m
- Root zone
- 4 m
- Root type
- Suckering, moderately spreading
- Lifecycle
- Perennial
- Recommended setback
- 1.5-2 m from paths and walls
- Growth rate
- Medium
- Hardiness
- USDA 3-7
- Crown density
- Medium / dense
Site requirements
These conditions decide whether the plant will establish well after planting.
- Clair
- Sun
- Watering
- Low / moderate
- Soil type
- Neutral to alkaline, drained
- Drainage
- Drained, drought tolerant after rooting
- Soil pH
- Neutral to alkaline
Root system and placement
Suckering shrub; leave room for spreading shoots.
Garden role and season
These fields help choose the plant by composition, privacy, flowering and year-round value.
- Form
- Multi-stem large shrub
- Foliage
- Deciduous
- Season
- Late spring bloom
- Bloom
- Fragrant lilac panicles
- Fruit
- Dry seed capsules
- Garden use
- Flowering screen, informal hedge, accent
Care and risks
This is the practical part for future maintenance and safe placement on the plot.
- Maintenance
- Low / medium
- Pruning
- Prune after flowering; remove suckers if needed
- Risks
- Can spread by suckers; poor bloom in shade.
Other plants
Return to the catalog or compare nearby options before placing plants on the site plan.
