Queen Elizabeth II, 94, and Prince Philip, 99, will often stay in the living quarters in Buckingham Palace. The royal property, which is based in London, has a staggering 775 rooms.
This includes a 512 ft herbaceous border, wildflower meadows, a rose garden and a 3.5 acre lake.
The rose garden is filled with 25 beds of roses which are made up of 60 bushes of a different variety.
The vast garden also consists of a staggering amount of trees, with more than 1,000 in the central London garden.
These include 40 types of mulberry tree, 98 plane trees and 85 different species of oak.
While the garden is private, some of the Palace’s garden secrets have been detailed in the behind-the-scenes book Buckingham Palace: A Royal Garden.
The book shares some traditions of the garden and inside information.
When staying at the Palace, the monarch reportedly receives a seasonal posy each Monday.
The flowers are chosen from the garden by the Queen’s Royal Florist and placed on the writing table of the monarch.
The tradition is believed to date back nearly 30 years, to 1992.
In the summer, sweet peas are a favourite with a mix of evergreen leaves and colourful berries being used in the winter months.
The Royal Collection Trust’s Buckingham Palace Gin is infused using plants and flowers gathered from the gardens.
It features botanicals such as lemon verbena, hawthorn berries, bay leaves and mulberry leaves.
The Palace’s head gardener, Mark Lane, shared an insight into the care of the large gardens.
He explained the lawn is mowed every week beginning when grass appears in Spring, and the edges must be clipped.
The grass is cut to create stripes which reportedly make it look larger and help to frame the flower borders.
There is also a lake with a hidden waterfall feature and secluded island.
Buckingham Palace: A Royal Garden, by Claire Masset, will be published by the Royal Collection Trust on April 13 costing £14.95 from Royal Collection Trust shops and £16.95 from bookshops.