The book is set to be released on April 12, just five weeks before the royal wedding, and it's sure to cause a stir among the royals and their fans alike.
Locally sourced foliage will be used, including from the gardens of the Crown Estate and Windsor Great Park.
The flowers will also include, where possible, plants that are "in season and blooming naturally in May".
Meanwhile, Prince Harry and Markle's royal wedding at St. George's Chapel in Windsor Castle will be broadcasted live on May 19.
Prince Harry has previously stated the importance his late mum has in his relationship with Markle.
He added: "If you were sitting in a script office in Hollywood, and you said "give me a character that will make them [the Royal family] relevant for the next 100 years", they [the ideas people] would have said: OK, she's bi-racial, divorced and an actor".
Montella ´angry´ but ´proud´ after Messi stuns Sevilla
That was until Barca boss Ernesto Valverde threw on the talisman as a substitute for Ousmane Dembele in the 58th minute. A photo of Lionel Messi's wife and three sons which the Barcelona star shared on his Twitter page on Easter Sunday.
"To be honest, I reckon Prince Harry has already got it". Many experts think Markle will choose a significantly less expensive dress, however, so as not to upstage Kate Middleton, who spent $350,000 on her gown. These will likely incorporate beech, birch and hornbeam branches and white garden roses, peonies and foxgloves. A new book written by famed Princess Diana biographer Andrew Morton has suggested that Meghan's lead role on the U.S. legal drama Suits eventually led to the demise of her past marriage to Trevor.
"Meghan looks up to Jessica and has, to a certain degree, modelled herself on her".
"She never confessed to being a fantastic gardener, but there were certain colours she liked in the garden - soft pinks, whites, yellow, pastel shades". "I am loving working with them, it is an incredible privilege, and the designs will be a true reflection of them as a couple, with sustainability at the forefront".
Harry, 33, and Markle, 36, have invited 600 guests to their wedding, although the names of the guests are still secret.
One year later, the pair announced their engagement - with the prince having popped the question as they were roasting a chicken one night at their home in the grounds of Kensington Palace.
"The process has been highly collaborative, free-flowing, and fun".