Customers interested in scheduling a free visit to the Coastal Maine Botanical Gardens, on May 1st-October 20th, can stop by the 2nd floor Reference Desk or give us a call at 207-333-6640, ext 2007. Free tickets for one group per day, from May 1st through October 20th. One group includes a maximum of two adults and children under 18. Tickets must be reserved in advance with the Reference Desk for a specific date and time.