A traditional Welcome to Country and Smoking Ceremony marked the occasion, and community volunteers helped carry out the planting.
Chair Commissioner Eric Lumsden said Heirisson Island played an important role in greening the city.
“By planting these trees, and more, we can provide habitats for local wildlife as well as increase the canopy cover of Heirisson Island,” Mr Lumsden said.
“This canopy cover helps cool the city and supports the City’s Urban Forest Plan, which is aiming to create 20 hectares of additional canopy cover by 2056.
“National Tree Day also fulfils an opportunity to connect with the local community, to do something good for our environment and experience the many benefits that come from spending time in nature.”
Native Swan Coastal Plain plants, including Melaleuca, Banksia and Casuarina species were planted.
Millions of volunteers have been involved with National Tree Day since it began in 1996, planting more than 24 million trees across Australia.
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