Plant · GBIF taxon 2985994
Hydrangea macrophylla
hydrangea macrophyllaAlso known as Bigleaf Hydrangea, Mophead Hydrangea, Lacecap Hydrangea, Hortensia
Bigleaf hydrangeas are robust deciduous shrubs famous for their dramatic, rounded flower heads that change color based on soil chemistry. Their large, serrated, glossy green leaves provide a lush backdrop for these summer blooms, which range from deep blue in acidic soils to vibrant pink in alkaline conditions. Native to coastal Japan, they have become iconic garden features worldwide, thriving in moist, semi-shaded environments.
FloweringDeciduousOrnamental
1 / 7- diet
- Autotrophic (Photosynthetic)
- family
- Hydrangeaceae
- threats
- Habitat loss in native range, powdery mildew, and extreme frost
- life Span
- 30 to 50 years
NE
All parts contain cyanogenic glycosides; do not ingest and keep away from pets.
Contains hydrangin, a cyanogenic glycoside that releases toxic cyanide when chewed, causing vomiting, diarrhea, and lethargy.
Wear gloves when pruning if you have sensitive skin, and ensure pets do not chew the leaves or stems.- Soil Testing: Adjust soil pH to influence bloom color, aiming for acidic for blue and alkaline for pink.
- Pruning Care: Prune immediately after flowering in late summer, as blooms develop on the previous year's wood.
- Watering: Maintain consistently moist, well-draining soil to prevent the large leaves from wilting in afternoon heat.