The splendour of Spring has been celebrated among the wonderful wildflowers at Werribee Open Range Zoo.

Visitors enjoyed special tours through native flowers and orchids in full bloom along the spectacular Western Basalt Plains walking trail.

Curator of Horticulture, Peter Sullivan, said special walking tours gave visitors a glimpse into the colourful world of endangered flowers and grasslands.

"This specially recreated area gives people a chance to see beautiful rare flowers, including the virtually extinct Sunshine Diuris orchid," Mr Sullivan said.

"Another highlight includes precious endangered grasslands, now reduced to less than one per cent of its original reach across the west of the state due to habitat destruction and degradation.

"We are trying to save these threatened plant species, which in turn provide precious habitats for our native animals."

Also, Children's Week activities celebrated wildflowers with fun-filled adventures through the Basalt Plains led by a Blossom Fairy. Other incentives included face painting, hair braiding and free entry for children under 15 years old (Saturday only).

"The weekend was a great chance for people of all ages to enjoy our colourful blossoming landscapes and to learn more about the importance of conserving them for our future generations," Mr Sullivan said.