Keywords for home page?

This might be a very stupid question. I have my home page set up as a posts page. It’s a widgetized home page, that won’t function if I set it up to be a static page. Therefor there is no specific page to edit the SEO information such as keywords for the page. How would I do that? I have set the description in the title & meta page, but I can’t do anything else for the home page.

http://wordpress.org/plugins/wordpress-seo/