Princess Diana reportedly became deeply involved in spiritual rituals before her tragic death, burying objects believed to carry “bad energy” in a secluded Kensington Palace garden near the secret grave of a friend’s stillborn baby.

The late royal’s longtime psychic and healer, Simone Simmons, claimed she and Diana performed private cleansing ceremonies in the palace grounds, where objects were placed in the earth before being dug up again with supposedly improved energy.

Simmons said the rituals took place near the same area where Diana helped close friend Rosa Monckton secretly bury her stillborn daughter, Natalia, in 1994.

Diana, who would have turned 65 this year, had a well-documented fascination with clairvoyants, astrologers, mediums and the afterlife during the final years of her life.

According to Simmons, that interest eventually became so intense that some of those close to Diana viewed her as a kind of “white witch” or spiritual healer.

“Anyone who dug around that area would be really surprised about what they would find buried there,” Simmons said.

“Diana got into burying items in the ground as part of a cleansing ritual. We would bury items she thought had a bad or evil energy, conduct a ceremony, and Diana believed the items emerged cleansed and with a better energy.”

Simmons, now 71, said one of the objects buried during the ceremonies was a collection of precious stones Diana had received as a gift from Saudi figures.

Diana reportedly believed the stones carried negative energy because of her concerns about the Middle East’s connections to the international arms trade.

The ceremonies are believed to have taken place along the western wall of a small, private garden at Kensington Palace that Diana loved.

Simmons regularly visited the princess at the palace and claimed the two sometimes spoke on the phone for as long as 14 hours a day.

Critics of Diana previously described Simmons as a “witch,” while Diana herself reportedly joked that the spiritualist was a “good witch.” She once asked a friend whether Simmons kept a cauldron at home.

One royal insider claimed Diana eventually began to see herself in similar terms.

“Diana spent so much time with her collection of psychics and clairvoyants, she became something of a ‘good witch’ or ‘white witch’ herself,” the source said.

“She always saw herself as a healer due to her extreme empathy, and when that was combined with her obsession with psychics and the like, she became a virtual white witch before her death.”

Diana’s interest in the supernatural also reportedly exposed her to a series of frightening predictions involving the royal family and deadly car crashes.

An inquest into her death heard that Diana referred to a clairvoyant used by Sarah Ferguson as “Fergie’s witch-woman.”

The nickname reportedly came after the medium warned Diana that then-Prince Charles was destined to die in a car crash.

Another psychic, Rita Rogers, allegedly told Diana that the brake cables on her own vehicle would be cut.

Diana also sought guidance from Madame Vasso, a Greek mystic who reportedly instructed clients to sit beneath a clear Perspex pyramid as part of a spiritual cleansing process.

The princess died at age 36 on August 31, 1997, following a high-speed car crash in Paris.

Years before her death, Diana had helped Monckton and her husband, newspaper editor Dominic Lawson, lay their stillborn daughter to rest in the Kensington Palace garden.

Monckton, a prominent business executive who was around 40 at the time, lost the baby while Diana was struggling with the emotional fallout from her separation from Prince Charles.

After learning of the tragedy, Diana offered the couple a private section of the palace grounds as the child’s final resting place.

To keep the nighttime burial hidden from palace security, Diana reportedly told staff that she was burying a pet in the garden.

Monckton later described the moonlit ceremony as “very, very moving.”

During the burial, she read a verse by Indian poet and Nobel Prize winner Rabindranath Tagore.

The next time Monckton read the same verse aloud was during a trip through the Greek Islands with Diana. It would become their final vacation together, taking place just 10 days before the princess was killed.

Diana later placed an urn above Natalia’s unmarked grave, hoping it would serve as a permanent memorial because no headstone had been installed.

However, after Diana’s death, the urn was reportedly removed along with her other belongings.

Control of the walled garden later passed to Prince Michael of Kent and his wife, Marie-Christine, who arranged for the area to be landscaped.

Contractors were reportedly instructed not to disturb the section where the baby had been buried and where Diana was said to have conducted her mysterious cleansing rituals.