Windmill Island Gardens will open for the 2025 season on Monday, April 14, and be open 7 days a week through Sunday, October 5, except Sunday, April 20 (Easter Sunday). The park opens at 9:30am, with the last admission sold at 5pm. Admission during our regular season (other than Tulip Time or special events) is $13 for adults and $6 for children 3-15 (2 & under are free).