I'm working on a comprehensive post about the area's community gardens. In the meantime, check out the Brooklyn Botanic Garden's famous cherry trees.
Sakura Matsuri April 28, 29 Brooklyn Botanic Garden’s peerless collection of cherry trees—-the largest and most diverse outside Japan—-creates a canopy of blossoms in the spring worthy of celebration. Over the past quarter-century, BBG’s Sakura Matsuri has evolved into one of the city’s most anticipated weekend events, as hundreds of thousands of visitors have experienced the breathtaking beauty of the cherry tree’s fleeting blossoms and learn about Japanese culture. Again this year, visitors from around the world and the New York metropolitan area alike will enjoy a dynamic weekend of music, dance, food, workshops, demonstrations, art exhibits, and guided tours of the Garden’s plant collections.
Festival hours are from 10 a.m. to 6 p.m. All activities are free with Garden admission and take place rain or shine, with indoor locations provided for all activities in the event of rain. Tickets are available through www.TicketWeb.com; for same day ticket information, visit bbg.org or call 718-623-7200. A detailed schedule of the festival is available by visiting Brooklyn Botanic Garden’s website, and additional information is available by calling the public events hotline at 718-623-7333.
If the weather's nice, you can walk right down Washington Ave, all the way to the Garden.