An Arnold Arboretum lilac. Scientific name: Syringa vulgaris 'Hulda'

Your Guide to Lilac Sunday 2015

If you plan to join the thousands of people enjoying Lilac Sunday at the Arnold Arboretum, here's what you need to know. First of all, don't drive. Really. Don't do it. It's good advice every year but it's crucial for Sunday's edition of the event.

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