Planteur will head to the Prix Dollar next before an ambitious crack at the Breeders' Cup Classic.
Marco Botti's six-year-old was a comfortable winner of the Group Three Winter Hill Stakes at Windsor having previously chased home Maxios in the Prix d'Ispahan back in May.
That form was franked at the weekend when Maxios ran out an easy winner of the Prix du Moulin, and Planteur has proved by finishing third in the last two Dubai World Cups that on his day he is a top-class performer.
"Planteur did it well at Windsor," said Botti.
"It was just what he needed and will have boosted his confidence.
"We've had to look after him this season as the ground hasn't been suitable for most of the year, he needs a bit of cut.
"He will run in the Prix Dollar next on October 5 at Longchamp and then he'll go for the Breeders' Cup Classic.
"He handles Polytrack but the dirt will be a different question."