It’s not possible to set specific requirements for where the widgets will display. All templates set to pull the sidebars will pull the widgets assigned to this sidebar. If you restrict the visibility, it will not display the sidebar anywhere.
You could try to edit how the sidebars display through CSS changes and targeting the specific page template, but the specific of the Blog sidebar is set in the templates which is not possible to edit on WP.com. The customization would depend on what exactly you are trying to achieve.
The topic ‘Widgets for Left and Right columns’ is closed to new replies.