Laid out in the 17th century, the park is nowadays 50 hectares! The first garden was mentioned since... 1656! They were described as: Des parterres avec une fontaine placée en leur milieu pour une superficie de 2 arpents, un petit parc contenant en bois de futaie 4 arpents et un verger contenant 3 arpents, which means "flowerbeds (2 acres) with a fountain in the middle, a small park (4 acres) and a 3 acres orchad".
Duke of Humières (he created this first garden) even planted a big oak (you still can see it!). In the 18th century, the castle fell to Nicolas-Louis de Breteuil, Louis-François de Gallifet and Jean-Baptiste-Marie du Tertre: they extended the park little by little. But we must wait a little, until the 19th century, to see the creation of the current garden.
In 1856, landscapers Bülher relaid out the park. They planted a nice collection of exotic trees! When Marthe and Georges Hersent came in 1920, they planted boxtrees in front of the castle. At the end of the 20th century, apple-trees and pear-trees orchard was created while one century later, they planted hybrid rosebushes: the replica of the Haye-les-Roses' rose garden! (Val-de-Marne)