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How to Grow Mme. Lemoine

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Mme. Lemoine

Syringa vulgaris 'Mme. Lemoine'

shrub

Mme. Lemoine is a classic double-flowered lilac cultivar known for its stunning pure white, fragrant blooms that appear in late spring. This deciduous shrub grows 8-10 feet tall and produces showy panicles of densely packed flowers. It's a beloved ornamental prized for its intoxicating fragrance and long-lasting floral display.

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Example Mme. Lemoine timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Mme. Lemoine

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Mme. Lemoine

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Mme. Lemoine dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6-8 hours daily (essential for abundant flowering)
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Water: Moderate watering; keep soil consistently moist during establishment and growing season. Once established, fairly drought-tolerant. Avoid waterlogged conditions.
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Spacing: 72 inches
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Days to maturity:
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Planting depth: Plant at same depth as root ball; do not bury stem

Soil

Type: Well-draining loamy to slightly alkaline soil
pH: 6.5-7.5
Amendments:
Compost Aged manure Lime (if soil is too acidic) Perlite or coarse sand for drainage

Growing Zones

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Thrives in zones 3-7, with excellent cold hardiness and spring blooming performance

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b

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Growth Stages

1

Establishment

First 12 months after planting

Young shrub developing root system and initial branching structure

Water regularly to keep soil moist but not soggy. Mulch around base. Avoid heavy pruning first year.

2

Vegetative Growth

Years 2-3

Shrub increases in height and width, producing leafy shoots and establishing framework

Prune after flowering to shape and remove dead wood. Thin out crossing branches. Fertilize with balanced fertilizer in early spring.

3

Pre-Flowering

Late summer through fall

Mature shrub develops flower buds in late summer/early fall for next spring's bloom

Avoid heavy pruning in late season. Provide consistent moisture. Do not over-fertilize with nitrogen.

4

Flowering

3-4 weeks in late May to early June

Dense panicles of pure white double flowers emerge in late spring, highly fragrant

Deadhead spent flowers to encourage tidiness (optional—doesn't increase blooming). Enjoy fragrance. Support heavy branches if needed.

5

Post-Bloom Maturity

Early summer through fall

Shrub returns to vegetative growth after flowers fade; mature foliage remains attractive

Complete major pruning within 2 weeks of flowering. Remove any crossing or diseased branches. Water during dry spells.

Companion Planting

Plan your garden →

Plant with:

Viburnum Weigela Spirea Deutzia Forsythia Boxwood Lavender Catmint Russian Sage

Avoid planting near:

Black walnut (juglone toxicity) Plants requiring acidic soil and constant moisture

Common Pests

  • Prune out heavily infested branches; apply horticultural oil in dormant season; introduce parasitic wasps

  • Remove infected leaves; maintain plant vigor; use spinosad if severe

  • Ensure good air circulation; avoid overhead watering; apply sulfur or neem oil if necessary

  • Monitor for tunneling; prune out affected branches; maintain tree health

  • Prune out blighted stems 12 inches below visible damage; sterilize tools; improve air circulation

Uses

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Cut Flower Arrangements

Household

Mme. Lemoine's spectacular double white flowers and intoxicating fragrance make it one of the finest lilacs for spring bouquets and indoor displays. The flowers last 5-7 days in water and perfume an entire room. [source]

🎨

Fragrance & Perfumery

Craft

The flowers can be dried for potpourri or used to create infusions and perfumed products. Lilac fragrance is highly valued in traditional perfumery. [source]

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Pollinator Habitat

Wildlife

Lilac flowers attract bees, butterflies, and other pollinators during spring bloom, providing essential early-season nectar. [source]

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Ornamental Landscaping

Household

An iconic spring-flowering shrub that serves as a focal point in gardens, screening, hedgerows, and naturalized plantings for centuries. [source]

Harvest Tips

Not a harvested plant. Cut flowering stems for indoor arrangements by cutting just above a leaf node. Harvest flowers in early morning when buds are opening for best fragrance and vase life (5-7 days in water).

Fun Facts

  • 🌱 Mme. Lemoine was named after French horticulturist and lilac breeder Victor Lemoine in the 19th century; it remains one of the most prized double-flowered white lilac cultivars.
  • 🌱 The double flowers have extra petals compared to single-flowered lilacs, creating dense, ruffled blooms—this doubling occurs through cultivation but means the plant produces no viable seeds.
  • 🌱 Lilacs can live 60-100+ years and are extremely long-lived; many historic gardens still feature century-old lilac plantings, including Mme. Lemoine specimens.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Deadhead Full Sun Mulch
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