It appears that ashes weren’t scattered, but rather placed in garden:
Willoughby Reginald Keith Taylor 19-4-1965 Ashes Ee - Rose Garden 5 - 0016
Helen was buried, cremation not indicated:
Helen Frances Gertrud (sic) Taylor 15-10-1947 Burial Seventh Day Adventist Monumental - Section 1 - 0035
Jamjar