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Health Services > Queensland Poisons Information Centre

Plants and mushrooms


close up of the Hydrangea flowerclose up of the Hydrangea flower and leaves 
close up of leaves of the Hydrangea plantHydrangea plant
Category 2 toxicity iconCategory 3 toxicity icon

 Common name   Hydrangea
 Botanical name   Hydrangea macrophylla
 Other common names   Big leaf hydrangea, mop heads
Family   Hydrangeaceae
 General description   An ornamental deciduous shrub to 3m tall cultivated for its large showy flowers.
Flowers   The blue, pink or less commonly, white flowers are in large dense clusters held at the end of the branches. Each flower has 4-5 petals.
Leaves   The shiny light green leaves are opposite, broadly ovate with a pointed tip and coarsely toothed margins, 10-20cm long and 6-14cm wide.
 Fruit/Berries   The fruit is a capsule 6-8mm long and 1-3mm in diameter with numerous tiny light brown seeds.
Other   -
Symptoms   All parts of the plant are poisonous. If eaten, symptoms can include nausea, vomiting and diarrhoea.
Skin contact can cause dermatitis, rash or irritation.
Toxicity category   2, 3
Warning   Seek medical attention if symptoms occur.

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Last Updated: 12 September 2007
Last Reviewed: 03 November 2008