Phantom Panicle Hydrangea

Hydrangea paniculata ‘Phantom’ is a deciduous shrub with exceptionally large, dense flower panicles on strong stems ([RHS](https://www.rhs.org.uk/plants/177820/hydrangea-paniculata-phantom/details)). Its flowers open creamy white, often with a pale green tint, then age through pink toward reddish tones from summer into fall ([Chicago Botanic Garden](https://www.chicagobotanic.org/plant-information/plant-finder/hydrangea-paniculata-phantom-phantom-panicle-hydrangea), [Trees and Shrubs Online](https://www.treesandshrubsonline.org/articles/hydrangea/hydrangea-paniculata-cultivars-m-r/)). Peter Zwijnenburg raised this selection in Boskoop, the Netherlands, by 1990; it later received the Royal Horticultural Society’s Award of Garden Merit ([Trees and Shrubs Online](https://www.treesandshrubsonline.org/articles/hydrangea/hydrangea-paniculata-cultivars-m-r/), [Chicago Botanic Garden](https://www.chicagobotanic.org/plant-information/plant-finder/hydrangea-paniculata-phantom-phantom-panicle-hydrangea)). ## Garden use and scale Use this large shrub in a border or hedge, or cut and dry its showy flower heads. Mature estimates vary: the Missouri Botanical Garden lists 6–10 feet tall and wide, the RHS gives 1–1.5 metres tall and 1.5–2.5 metres wide, and Chicago Botanic Garden lists about 6 feet in each direction. Leave room for the broad crown and heavy flower clusters; the cultivar’s sturdy stems help keep the heads upright. ## Growing conditions Grow in full sun to partial shade and moist, well-drained soil; the RHS lists clay, loam, or sand and a range of soil pH values. Missouri Botanical Garden and Chicago Botanic Garden list USDA zones 3–8. Flowering begins in midsummer and can continue into fall, with large white heads gradually turning pink and reddish as they mature. ## Maintenance Panicle hydrangeas bloom on current-season growth, so prune as needed in late winter or early spring. Missouri Botanical Garden notes that thinning to five to ten main shoots can produce larger panicles. The RHS identifies this plant as a skin allergen and harmful if eaten by dogs or cats; wear gloves when handling it and keep pets from chewing the plant.