Viburnum plicatum
Japanese snowball
Common names: Doublefile viburnum
At a glance
- Light
- Partial shade
- Hardiness
- Hardy
- Pruning
- Jun–Jul
- Flowering
- May–Jun
Photo: Wouter Hagens · Public Domain · Source
Description
The Japanese Snowball grows in clear, horizontal tiers, becoming an architectural focal point in the garden. In May to June, the branches are covered with white, plate-like flowers that resemble small snowballs at their edges. In autumn, the foliage turns warm red and bronze tones before falling. Unlike the native Common Snowball, this species originates from East Asia and adds structural variety to hedges and solitary plantings, especially in popular cultivars such as 'Mariesii'.
Care instructions
Plant the Japanese Snowball in a semi‑shaded to sunny spot with humus‑rich, evenly moist soil; it does not tolerate heavy midday sun or waterlogging. Water regularly during the first year, especially in prolonged dry spells in summer. Pruning is rarely necessary; if shaping is desired, cut immediately after flowering in June to preserve the tiered structure and allow flower buds to mature for the next year. A mulch layer of leaf litter or bark humus in spring keeps the root zone moist and suppresses competing vegetation. In harsh conditions, young plants benefit from some winter protection on the north side.
The care notes were machine-translated from German.
Garden year
FloweringMay–Jun
Soil & site
Soil pH
Soil type
well-drained, humus-rich, moist, nutrient-rich
The Japanese snowball likes humus-rich, evenly moist soil that lets water through well and does not become waterlogged. It is happiest on nutrient-rich garden soil with a slightly acidic to neutral pH of 5.5 to 7.0. It responds to very chalky, very dry or compacted sites with stunted growth, so it is worth adding a portion of compost or leaf mould to the planting hole.
Feeding
Medium feeder
Months
Mar, May
An application of compost in early spring is enough for most shrubs for the whole season. If you want to top up once more after flowering in May, work ripe compost or well-rotted manure shallowly into the soil around the base. A layer of mulch of leaves or composted bark keeps moisture in the root area and supplies organic material as well.
Pruning
Straight after flowering in early summer is the best time for a thinning cut, so that the characteristic, horizontally layered growth habit is preserved. Remove dead, crossing or overcrowded shoots at the base rather than shortening the tips across the board. Cutting back in winter or spring costs you next year's flowers, because the flower buds are already formed in late summer.
Overwintering
The Japanese snowball is hardy in most parts of Germany, Austria and Switzerland and needs no special protection. Young, freshly planted shrubs welcome a layer of leaf mulch over the root area in the first one to two winters. In very frosty, wind-exposed sites, fleece around the shoot tips can protect young shoots from frost desiccation.
Propagation
Methods
- Cuttings
- Layering
Cut semi-ripe cuttings best in summer after the main growing phase, when the shoots are already a little woody but still flexible. They root reliably in free-draining seed compost in a bright, warm spot without strong sun. Alternatively, layering a low shoot in spring is suitable; lightly score it and weigh it down with soil until it has formed its own roots after one to two years. Sowing is possible, but because of the long seed dormancy it takes much longer and rarely gives plants true to variety.
For your garden
Grow Japanese snowball yourself
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