 Meanwhile, the New South Wales Government was looking to curb flower and plant collecting from the wild, and considered prohibition in 1944, but after witnessing the ability of Parry to manage and develop cultivation, introduced compulsory licences for wildflower collecting the following year.With his wife Olive, Percy promoted and developed knowledge over fifty years and received the Order of Australia medal in 1981.Following on from the Parrys were Howard Gay and Arch Dennis, who pioneered growing waratahs at Monbulk in the Dandenong Ranges in the 1940s, Sid Cadwell and Frank Stone, who did likewise in Dural and the Blue Mountains respectively.