Semi-formal, or sometimes called, "dressy casual." The ceremony will be outside and the reception inside. We found this info from brides.com to be most the clearest and most helpful: "Women can wear below-the-knee dresses, slip dresses, a dressy skirt and top, or an elegant pantsuit (styled with heels, nice wedges, or formal flats). As for men, opt for a dress shirt and slacks, with the option to wear a tie." Semi-formal means fairly nice, but go ahead and add some color, personality, flare, sparkles, etc.
May 15th, please! If your plans change, please let us know.