Presentations on gardening as well as hands-on floral workshops will be among this season’s classes to be offered at Lockwood’s Greenhouses, 4484 Clark St., Hamburg. Registration is necessary for all classes. You can register for most of the classes online now (some of the classes aren’t posted on the Lockwood’s site yet– check back soon), at the store or by calling 649-4684. Coming up first are two classes this Saturday, April 5, where you can learn how to integrate food…