Thousands are set to flock to the King's Norfolk estate for one of the county's best-loved summer events.

Sandringham Flower Show sees the rolling grounds of the monarch's Norfolk retreat transformed into a riot of colour.

Dubbed Britain's biggest church fete, the event draws crowds of more than 20,000.

Colourful marquee displays are always popular with show-goersColourful marquee displays are always popular with show-goers (Image: Chris Bishop)

King Charles and Queen Camilla are not expected to be joining them on Wednesday due to existing diary commitments but other royals are likely to attend.

READ MORE: King and Queen attend Sandringham Flower Show

From humble origins more than a century ago, when it was founded to encourage tenants on the Royal Estate to care for their gardens, the show has grown into a major celebration of gardening and the outdoor life.

Sandringham Flower Show always draws the crowdsSandringham Flower Show always draws the crowds (Image: Chris Bishop)

Top nurseries will be showing off their wares, along with stalls selling just about every conceivable item of garden bling - from plant labels to designer furniture and greenhouses.

Show gardeners will be competing for the EDP Best in Show trophy and vying for votes in the people's choice poll.

Others will be battling it out in the keenly-contested produce competitions.

Food and drink also feature highly on the day, with local producers showcasing all kinds of treats.

Visitors enjoy a spin on a vintage carousel at Sandringham Flower ShowVisitors enjoy a spin on a vintage carousel at Sandringham Flower Show (Image: Chris Bishop)

Main ring events include Shetland pony, quad bike and gun dog displays throughout the day, while there will also be bands and fairground rides.

The profits from each show are donated to local charities and since 1977 the show committee has donated more than £825,000 to good causes.

Tickets are priced £21 on the day, with under-16s free. Admission includes entrance to Sandringham Gardens and Sandringham Church, which both border the showground.

Gates open at 9am and parking is free, while roads around the site are likely to become busy throughout the day.