The event sponsored by Bradstone celebrates landscaping across 13 categories and is seen as an important stepping stone towards national recognition for winning landscapers.
"Each year since 1995 the awards have recognised and rewarded the high standard of landscape contracting carried out by our registered members," said a spokeswoman.
"Winners don’t just get a framed certificate; they will benefit from an average of £2,000 worth of consumer media coverage, a logo to add to your website and template certificates to present to your team and contractors to boost staff morale."
Categories include supreme winner for best of the best, won earlier this year by the Garden Builders for a suburban London landscape. Other categories include projects up to £30,000, £60,000 and £100,000, best hard landscaping and best maintenance.
Deadline for Initial entries is 28 September with final project presentations 31 October. The awards presentation will take place at the Roof Gardens in Kensington, London, on Wednesday 13 March 2013.