Sandringham gardeners also aimed to combine specialist horticultural practices and techniques to ensure the topiary is maintained with plentiful visual seasonal colour from the flowers.

The estate’s gardens have been open since April at the start of the visitor season.

The topiary garden, which sits within the main gardens, is accessible to the public but it is not at full completion stage yet.

The garden’s completion follows the Sandringham in Bloom festival, which was held earlier this month to “celebrate all things flora and fauna” at the King and Queen’s Norfolk home.

The nine-day event included the opportunity for guests to personally dine with the head gardeners of the sovereign’s estates for a four-course meal costing £120.

The meal – which was held inside Sandringham Restaurant – featured ingredients grown in each of the Royal gardens, many of which are personally overseen and tended to by the King, such as honey, rhubarb and herbs.

The gardens at Sandringham are open daily (except Fridays) until October 12.