A section of marshland at Point Pelee National Park that was scorched by a massive fire in March is healthier than ever before, according to park staff.

The roaring flames devoured 143 hectares of old cattails, releasing nutrients and leaving space for light to reach areas it hadn't touched in years, said superintendent Maria Papoulias.

Point Pelee Fire

A blaze burns at Point Pelee National Park in Leamington, Ontario on March 29, 2017. (Alan Antoniuk/Submitted photo. (Alan Antoniuk)

"Although you can't see it with your eyes it's actually healthier than it ever was," she explained. "Fire is actually a natural process of regeneration in this marshland."

The blaze began on the evening of March 29, drawing curious onlookers and emergency services who battled it throughout the night until rain helped douse the flames the following morning.

Point Pelee National Park

Burned-out marshland at Point Pelee National Park should bounce back better than ever with the possibility for new vegetation to be introduced, say experts. (Stacey Janzer/CBC)

Crews managed to save the park's famous boardwalk, and Papoulias said the fire could not have come at a better time.

"The marsh was effectively still sleeping," she said. "It happened before the birds had really arrived and started nesting."

Investigators still don't know what sparked the fire and the superintendent said it's possible the cause won't ever be discovered.

Park staff plan to study the marsh's new growth and Papoulias said it's possible new vegetation might have begun growing from the ashes.