A man wearing a floral arrangement on his back takes part in the annual flower parade, in which flower growers known as “silleteros” present their floral arrangements, in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

Flower growers known as “silleteros” carry their flower arrangements during the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, looks at flower arrangements as he participates in the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, looks at flower arrangements as he participates in the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, looks at flower arrangements as she participates in the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, looks at flower arrangements as she participates in the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, looks at flower arrangements as he participates in the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

Flower growers, known as silleteros, look at flower arrangements during the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

Flower growers, known as silleteros, look at flower arrangements during the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)

A flower grower, known as a silletero, rests on the ground during the annual flower parade in Medellin, Colombia, August 9, 2015. (Photo by Fredy Builes/Reuters)