Organic Themes supports WordPress Custom Menus. Custom Menus are used to manage the order of your menu items. In addition to managing your pages, the Custom Menu also allows for the addition of categories, custom links and custom post types to the main menu of your site.
A home link can be added to your menu using a custom link by applying “Home” as the label, and the address of your website as the URL.
For more information on setting up a custom menu, please see the following WordPress Codex entries: