Tracking the flowering and fruiting of Posidonia australis

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What is Seeds of the Sea?

Seeds of the Sea is a citizen science and research project focused on tracking the flowering and fruiting of Posidonia australis — an endangered seagrass critical to the health of New South Wales estuaries.

With support from community members, divers, Indigenous Rangers, and scientists, we’re documenting these reproductive events to fill critical data gaps and guide future restoration.

In NSW, flowering is limited and still not well understood. Recent surveys have found flowers and viable seeds across multiple estuaries. Your sightings can help reveal when and where this is happening, opening the door to seed-based restoration in areas that need it most.

Learn More about the Project

Why track flowering and fruiting?

Posidonia meadows are disappearing — especially along our most developed coastlines. In other parts of Australia, large-scale restoration is already underway using seeds collected during flowering events.

But in NSW, we still don’t know enough about when or where flowering occurs — or how it varies between estuaries. By tracking these events in real time, we can support future restoration efforts and help bring back lost meadows.

Flowering season is starting! Sightings usually begin in August — help us track it across NSW.

Report a Sighting

When does flowering happen?

The flowering and fruiting season in NSW usually runs from August to December, sometimes extending into January. Timing can shift from year to year and between locations — and what actually triggers flowering is still unknown. Your observations can help us close those knowledge gaps.

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