Gatwick Airport is the headline sponsor of the South and South East in Bloom competition.
South and South East in Bloom is one of 16 regions in the Royal Horticultural Society’s Britain in Bloom Campaign.
About 300 communities took part in the competition last year with entries across 30 categories.
This year’s competition is expected to be the biggest to date.
Melanie Wrightson, Gatwick Airport community engagement manager, said: “Sharing the benefits of our airport by supporting projects that make a real difference to communities living locally to Gatwick is extremely important to us.
“When selecting projects, we look for those that contribute to the local environment, promote health and wellbeing and bring communities together.
“We feel South and South East in Bloom does an exceptional job and we’re proud to be the headline sponsor for the fourth year running.”