The Royal Baby fever has caught on at Gardens by the Bay.

The organisation posted its congratulations on Wednesday on their Facebook page to Prince William and his wife Kate, as they welcomed their baby boy into the world on Monday.

"We wish the young parents all the best as they embark on a new journey of their lives!" the post read.

Gardens by the Bay also posted a photo of the tree that the Duke and Duchess of Cambridge planted during their visit to Singapore in September last year. The white Pachira glabra "Variegata", commonly known as the Money Plant, symbolises prosperity.