I don't usually like 'antiqued' fonts, but this one pulls it off pretty well, I think. Not my first choice, but I wanted to give you one option in this direction.
This might not look right at first but it really does have a great lightness that befits the lemon image. It is an old font from the 1920s, but I feel like it also has a very modern feel, which is a nice balance. There is an italic (below) that could be used alongside.
A font designed for the Met in the early 1900s. It has really lovely curved serifs and just really elegant proportions. I love that it has great italic and all-caps versions, as well.
This is a remarkably well-priced font that has nice roman, italic, and small-caps faces. As a family, I think you could do just about anything with this font - might be nice to have such a versatile font to carry through the invitation as well. (Though there are others in this album that are similarly capable of that.)
This is an unusual script, but it has a lightness that I love - the occasional bold swashes give it an old hand-lettered feel. I think it would pair nicely with a thin gothic like the 'Sweet Gothic Light' above.
This font is from the early 1900s. I like the tall elegant letter shapes and appreciate the uppercase-lowercase height contrast. There is plenty of open-ness and space. I think this would work as a solo font choice.