Prince Harry did everything to keep his mother’s memory alive on what was the 23rd anniversary of her passing on August 31. The prince, 35, and his wife Meghan, 39, paid homage to his mother’s memory by volunteering with the Preschool Learning Centre in LA, spending the morning planting Diana’s favourite flower, forget-me-nots, in the garden. The pair also got their hands dirty planting vegies and reading books about gardening to the children, who come from impoverished backgrounds – something Diana would no doubt have loved. It comes as reports suggest Harry will return to the UK in July for the unveiling of a statue to mark Princess Diana’s 60th birthday.…