🌸 Lilac: A Fragrant Spring Wonder

🌿 Complete Presentation of Lilac

Common lilac (Syringa vulgaris) is a deciduous shrub from the Oleaceae family, native to the mountainous regions of the Balkans. Introduced to Western Europe in the 16th century from Constantinople, lilac quickly won gardeners' hearts. By the 17th century, it adorned castle gardens, becoming a spring symbol.

Lilac reaches 3 to 7 meters in height depending on varieties, with 30-40 cm/year growth in early years. It forms a dense bush through numerous shoots. Its gray bark cracks with age. Heart-shaped leaves appear in tender green in spring.

Detailed Botanical Characteristics

Lilac leaves measure 5-12 cm, opposite, heart-shaped at base. They are glabrous on both sides with visible pinnate venation. The mixed root system includes a 1.5-2m deep taproot and spreading roots at 30-50cm. This system explains drought resistance and abundant suckering ability.

🌺 Blooming: Understanding Everything

Blooming occurs between April and June by region and variety, peaking in May. It requires 800-1000 cold hours <7°C (vernalization). Each inflorescence (thyrse) bears 300-400 small 8-15mm flowers. Colors range from white to purple via anthocyanins.

🌿 Lilac Varieties

Over 2000 varieties exist, created by Victor and Émile Lemoine (Nancy, 1850-1950) who revolutionized cultivation. Classification by: flower type (single/double), color, period, size. Simple flowers (4 petals) more fragrant, doubles (8+) more luxuriant and lasting.

🌱 Growing and Care

Planting

Best period: October-November or March-April outside frost. Hole 60x60cm minimum. Critical drainage: 10cm gravel if clayey soil. Building distance: 2m minimum. pH 6.5-7.5 (neutral to alkaline). Planting watering: 10-20L. Mulching 5-10cm.

Pruning

Prune just after blooming (June max) as flower buds form July. Heading: remove faded flowers. Rejuvenation pruning: every 5-7 years, remove 1/3 old trunks at ground. Never autumn/winter (removes blooming). Thin center if too dense.

Fertilization

Spring: compost 3-5kg/plant scratched surface. Autumn: bone meal 100-200g/plant. Avoid nitrogen excess (foliage over flowers). Dolomite 150-200g/m² every 3-4 years maintains optimal pH. Lilac not greedy but appreciates properly fed soil.

🗺️ Regions and Climate

Lilac thrives in temperate zones with cold winters. Optimal distribution: temperatures <0°C 2-3 months allowing vernalization. Excellent: north/east France, central Europe, northeast USA, southern Canada, Russia, northern China, Japan. Difficult: mild climates (Mediterranean, tropics) without sufficient cold.