How to Grow Lilac Time
Wikimedia Commons
Lilac Time
Syringa vulgaris 'Lilac Time'
shrubLilac Time is a deciduous flowering shrub known for its fragrant, double purple-pink blooms that appear in spring. This cultivar of common lilac is prized for its abundant flower clusters and extended blooming period. It grows into a multi-stemmed shrub that makes an excellent specimen plant, hedge, or screen.
When should you plant Lilac Time in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Lilac Time timeline · Pittsburgh, PA (Zone 6b)
-
Plant Lilac Time
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Lilac Time
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Lilac Time dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 3-7; thrives in cold climates with distinct seasons
Sign up free to see if Lilac Time grows in your zone — and get a personalized planting timeline.
Get my Lilac Time timeline →Growth Stages
Establishment
Year 1Young shrub developing root system and branch structure; slow initial growth
Water regularly during first year, mulch to conserve moisture, avoid heavy pruning
Vegetative Growth
Years 2-3Shrub develops woody stems and dense foliage; increases in height and width
Prune spent flower clusters after blooming, remove crossed or damaged branches, thin branches if needed
Pre-flowering
Fall through early springShoots mature and develop flower buds over fall and winter; visible buds appear by late winter
Do not prune heavily; avoid frost damage to buds; ensure adequate winter chilling (800+ hours below 45°F)
Blooming
4-6 weeks in springDense, fragrant panicles of double purple-pink flowers open in mid to late spring; flowers last 2-3 weeks
Deadhead spent flower clusters to encourage more blooms and prevent seed set, apply balanced fertilizer after bloom
Post-bloom & Dormancy
Summer through winterFoliage remains lush through summer and fall; leaves turn yellow in autumn before dropping
Monitor for pests and diseases during growing season, reduce watering in fall, allow shrub to go dormant
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Remove infested leaves, apply neem oil in early summer, encourage natural predators
-
Ensure good air circulation, avoid overhead watering, apply sulfur dust or fungicide if severe, remove affected leaves
-
Prune out heavily infested branches, spray dormant oil in late winter/early spring before bud break
-
Hand-pick early morning, use row covers on nearby plants, apply Japanese beetle traps away from lilac
-
Prune infected shoots 12 inches below visible damage, sterilize pruners between cuts, avoid overhead watering
Uses
Flavoring & Infusions
CulinaryLilac flowers have a delicate floral flavor and can be used to infuse syrups, honeys, and beverages. Flowers are also candied for decorating cakes and desserts. [source]
Traditional Herbal Remedy
MedicinalLilac has been used in traditional medicine as a febrifuge and tonic. Flower and leaf infusions are said to have anti-inflammatory properties, though scientific evidence is limited. [source]
Fragrance & Perfumery
HouseholdLilac flowers are valued for their sweet, distinctive fragrance and are used in perfumes, colognes, soaps, and scented products. Fresh sprays bring fragrance indoors. [source]
Cut Flowers & Arrangements
CraftThe abundant, long-lasting flower clusters make lilac ideal for fresh floral arrangements and spring bouquets. Both single and double varieties are prized by florists. [source]
Pollinator Support
WildlifeLilac flowers attract bees, butterflies, and other pollinators early in the spring season when food sources are scarce, supporting local ecosystems. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Lilac is grown for ornamental flowers. Cut flower sprays early in the morning after dew dries but before heat of day. Make cuts at a 45-degree angle above a leaf node. Cut stems will last 7-10 days in water indoors. For prolonged flowering, remove spent blooms immediately after they fade.
Fun Facts
- 🌱 Lilac Time is a double-flowered cultivar, meaning its flowers have extra petals, making blooms appear fuller and more ornamental than the wild single-flowered form.
- 🌱 Lilacs require a period of winter chilling (vernalization) to set flower buds—they typically need 800+ hours below 45°F, which is why they thrive in cold climates and struggle in warm regions.
- 🌱 The fragrance of lilac comes from at least 64 volatile organic compounds, making it one of the most chemically complex flower scents in nature.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Lilac Time planting timeline
Tell us your zip code and we'll calculate exactly when to start Lilac Time seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Lilac Time timeline →