Jardines de México is the world's largest garden. It's near the small city of Puente de Ixtla (an MXN$130 taxi ride) in Morelos and also the lake of Tequis.
It's big and quiet, with many themed gardens and facilities for dogs. They also have the option for you to take their ride in the park although it's not necessary, and you can buy tickets online prior to your visit (and they will have your name to receive you at the entrance).
My favourite part was the Italian garden which was in a grand continental style, but the Japanese garden was very impressive also. The restaurant was the only part that wasn't very satisfactory. Apart from the high costs, the orange juice was basically tasteless and service wasn't efficient despite there being few customers and many staff members around.