Preston Lilac

Syringa prestoniae

Oleaceae · broadleaf deciduous shrub · introduced

Last updated March 8, 2026

Data Coverage 3 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

Quick Facts

Height

8–12 ft

Light

Full Sun

Hardiness

Zone Zones 2a–8b

Diseases (8)

Podosphaera aphanis var. aphanis Powdery Mildew Pseudomonas syringae pv. syringae Bacterial Blight Botrytis cinerea Gray Mold abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Symptom category — not a single disease Leaf Spot Lilac ring Lilac Ring Mottle Phytophthora spp. (P Phytophthora Canker and Shoot Blight Symptom category — not a single disease Root Rot

Pests (5)

Lepidosaphes ulmi Oystershell scale Caloptilia syringella Lilac leafminer Podosesia syringae Lilac borer Ash borer Otiorhynchus spp. Root weevil

Cultivars (1)

'James Macfarlane'

Common name: James Macfarlane Lilac; Mature height: 8–10 ft

Hardy to USDA Zone 3