You can use Widget Logic ( http://wordpress.org/extend/plugins/widget-logic/ ) to control the appearance of widgets in different pages of your website.
To show widgets only on homepage, use this conditional tag –
is_home()
If you are using static front page,
is_front_page()
If you’re good with php, you can use these tags in your code without going for widget logic plugin.
More information about conditional tags is here – http://codex.wordpress.org/Conditional_Tags