This year the city celebrates the 25th annual International Rose Trials which are held in Tollcross Park.
Almost 100 judges from countries including Australia and the USA will descend on the park on Thursday and Friday to check out the blooms.
This year, 22 new varieties have been submitted by breeders and growers from a wide range of countries.
They are only accepted for the competition on the understanding they are, or will be, made commercially available in the UK. The roses are given 18 months to establish themselves and are assessed over two growing seasons by a permanent panel of judges.
The final assessment is carried out by a panel of judges made up of a cross section of international rose growers and societies.
As well as the medals decided by the judges, the public also get to vote for what should get The People's Choice award.
Alistair Watson, the city council's executive spokesman for land and the environment, said: "During the course of its 25 years, the International Rose Trials held in Tollcross Park have flourished in both stature and reputation.
"In this landmark year for our International Rose Trial it is especially gratifying that we continue to attract such a high calibre of breeders, suppliers, judges and enthusiasts who regularly go to the rose garden to attend the varieties on trial.
"By growing the roses in Tollcross Park, these beautiful blooms can be seen and enjoyed by the park's many thousands of visitors during the summer months."
The park's rose garden now features 16 dedicated beds with around 4100 plants providing a stunning display.
Climbing roses were introduced to the gardens in 2005 and these are grown on two metre high obelisks close to the trial beds.