Although sakura matsui has just passed, it is not too late to head to the Brooklyn Botanic Garden to revel in the cherry blossoms.
And if cherry blossoms aren't your particular nature thing, there are dozens of other springtime flowers and plants to satisfy all your springtime outdoor needs, including crabapple:
The garden is indeed a lovely place to spend a morning. Bring a book, or your knitting, or simply enjoy sitting and listening to the birds. The smell of the hyacinth will sustain you through the rest of your day.