But we get this question all the time from readers about doing the reverse i.e How do i post automatically to Google+ right from blogger.com / blogspot.com?
Until today it was not possible to do that. Now there is good news. As part of the effort by Google to socialize their products, Blogger team today rolled out a feature that allows exactly what you were asking for. A tighter integration between blogger and Google+ and it allows to share your post with your Google+ friends, circles or others right from blogspot.com.
Follow steps outlined in switch your Blogger profile with your Google+ profile
Refer image above for connecting blogger to Google+
Write a post as usual on blogger
Publish the post
Once successfully published, you’ll be presented with a Google+ share box
Enter a comment, Add people or circles and hit Share
That’s it. Your blog post is instantly posted to Google+
READ MORE:http://google-plus.com/3530/how-to-connect-and-post-to-google-from-blogger-or-blogspot/