Meet in Chedraui, Puerto Aventuras Parking lot near small bus stop cover at 8:30 or ,meet at Garden around 9:30am. I was told admission cost was 120 pesos. Bring sun screen, bug repellant and water.
As You are driving on 307 in direction of Cancun Airport and get to the road split to Puerto Morelos, take road to right and the garden is right there. (about 15 minutes before you get to the Airport)