An early Sunday morning start saw members of the Rotary Club of King's Lynn, along with family and friends, planting 16,000 crocus bulbs on the new roundabout at Edward Benefer Way.
The volunteers gathered at 8am on Sunday 8 November to plant the bulbs, which should bring a colourful display of purple flowers to the area next spring.
The latest planting follows a similar effort last year, when 8,000 bulbs were planted on the same roundabout, bringing the total to 24,000.
But there is more to the display than simply brightening up one of the town's roads.
The purple crocuses are part of Rotary International's long-running campaign to help eradicate polio, a disease the organisation has been working to eliminate worldwide since 1985.
The colour has a particular significance. During vaccination campaigns, children's fingers are often marked with purple dye to show they have received their immunisation.
Rotary has contributed more than $2 billion towards the global effort and helped support the vaccination of more than three billion children across 122 countries.
Town Hall lit for Polio Plus Campaign
Considerable progress has been made, with wild poliovirus now endemic in just two countries, Afghanistan and Pakistan. However, outbreaks of other forms of poliovirus, including in Gaza, have highlighted the importance of maintaining vaccination programmes.
The King's Lynn planting was made possible with support from local businesses and organisations.
The club thanked David Chilcott of Health and Community Construction, which is building 77 independent flats near the roundabout, for sponsoring the bulbs.
Thanks were also extended to St James Health Centre for providing parking for the volunteers during the morning.
With 24,000 bulbs now planted over two years, the roundabout should become a striking sight when the crocuses flower in spring, providing a reminder of the work being carried out around the world to bring an end to polio.
Photos: Supplied By King's Lynn Rotary
