Horticulture ClassesAll classes take place at Warner Castle unless otherwise stated in the description. For off-site classes, you will receive directions by mail or email before the class. Preregistration is required for most classes. Register early! Most classes have a maximum of 20 students or less. Classes which require materials may not be able to accommodate last-minute registrations. 10 days notice required for refunds for canceled registrations. In case of bad weather, RCGC is usually closed when the city schools are closed. Outdoor classes generally take place rain or shine, so dress accordingly. If in doubt call 585/473-5130.