How to Grow Doublefile Viburnum 'Summer Snowflake'
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Doublefile Viburnum 'Summer Snowflake'
Viburnum plicatum var. tomentosum 'Summer Snowflake'
shrubA deciduous to semi-evergreen ornamental shrub prized for its tiered branching habit and abundant white lacecap flower clusters that appear in late spring and often reflower in summer. This cultivar is a compact selection of the doublefile viburnum, reaching 4-6 feet tall and wide, making it ideal for smaller landscapes. The horizontal branching creates a distinctive architectural form, with flowers arranged in flat clusters along branch tops.
When should you plant Doublefile Viburnum 'Summer Snowflake' in your zone?
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Example Doublefile Viburnum 'Summer Snowflake' timeline · Pittsburgh, PA (Zone 6b)
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Plant Doublefile Viburnum 'Summer Snowflake'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Doublefile Viburnum 'Summer Snowflake'
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Doublefile Viburnum 'Summer Snowflake' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-8, with best performance in zones 6-7
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Get my Doublefile Viburnum 'Summer Snowflake' timeline →Growth Stages
Establishment
First 12 monthsYoung plant with underdeveloped branching structure and limited foliage density. Root system still developing.
Water consistently; avoid fertilizing first year. Mulch with 2-3 inches of organic material. Protect from wind. Do not prune except to remove dead wood.
Development
Year 2-3Plant gradually develops characteristic tiered branching habit; foliage fills in. Early flowering may occur but is sparse.
Continue regular watering. Apply balanced fertilizer in early spring. Allow natural form to develop; minimal pruning needed. Remove crossing or damaged branches.
Flowering (Spring)
4-6 weeks in springDense clusters of small white flowers arranged in flat lacecap formations along branch tops in late May through June. Inner fertile flowers surrounded by showy sterile florets.
Do not prune immediately after flowering if you want to keep buds forming for summer flowers. Deadhead spent flower clusters only if desired for tidier appearance; this may reduce summer reflowering.
Summer Reflowering
4-8 weeks in mid-late summer'Summer Snowflake' produces a second flush of flowers in mid to late summer, though lighter than spring bloom. Foliage remains dense and dark green.
Maintain consistent moisture during hot months. Light fertilization in early July can support rebloom. Avoid heavy pruning that removes flower buds.
Fruit & Fall Color
August through winterSmall red berries (drupes) develop on female flowers, aging to black by fall. Foliage turns burgundy to purple in autumn before dropping (semi-evergreen in mild climates).
Leave fruit for wildlife and winter interest. No special care needed. Prune in late winter if needed to maintain shape.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Monitor for skeletonized leaves in early summer; prune out affected branches. Spray with neem oil or insecticidal soap in late May when crawlers appear. Remove egg-infested twigs in dormant season.
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Hand-pick egg-infested branches in winter. Pruning affected foliage in June can reduce populations. Horticultural oil spray in early spring before bud break.
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Spray strong water stream to dislodge; use insecticidal soap or neem oil for heavy infestations. Encourage natural predators like ladybugs.
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Increase humidity; spray foliage with water. Use miticide or neem oil if severe. Avoid over-fertilizing which can trigger infestations.
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Ensure good air circulation; avoid wetting foliage. Prune to thin canopy. Apply sulfur or horticultural oil spray if severe. Remove and destroy affected leaves.
Uses
Cut Flowers & Floral Arrangements
HouseholdThe elegant lacecap flower clusters are excellent for fresh flower arrangements, lasting 7-10 days in a vase with fresh water. The horizontal branching structure adds architectural interest to designs. [source]
Food Source for Birds
WildlifeThe red and black drupes (berries) provide important late summer and fall food for songbirds, including cardinals, mockingbirds, and thrushes. The dense foliage also offers shelter for nesting and roosting. [source]
Landscape & Garden Design
Craft'Summer Snowflake' is ideal as a specimen plant, focal point shrub, or in mixed borders. Its tiered branching and manageable size make it perfect for Japanese gardens, shade gardens, and contemporary designs. [source]
Fragrance
HouseholdThe flowers emit a subtle, delicate sweet fragrance that is particularly pleasant in late spring, adding sensory dimension to gardens when flowers are in bloom. [source]
Traditional Herbal Uses
MedicinalIn traditional folk medicine, viburnum species have been used to support reproductive health and muscle tension relief. Consult healthcare providers before any medicinal use. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
This is an ornamental shrub, not harvested for food. Cut flower clusters for fresh arrangements in late May through June, or again in mid-summer during the rebloom period. Cut stems at an angle above a leaf node for continued plant development.
Fun Facts
- 🌱 'Summer Snowflake' is named for its remarkable ability to reflower in mid-to-late summer, unusual among most viburnum varieties which typically flower only in spring.
- 🌱 The tiered, horizontal branching pattern of doublefile viburnums is called 'plicata' and naturally creates an elegant pagoda-like silhouette without pruning.
- 🌱 Viburnum species are native to temperate regions worldwide and have been cultivated in gardens for centuries; this particular cultivar was selected specifically for its repeat blooming habit and compact form.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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