You can upload as many photos to Google+ even if you don’t own an Android based phone. You can send images to Google+ using iPhone or any other app that is capable to send pics to Picasa – Google’s image organizer (These steps are provided by Mashable).
You can upload Photos to Google+ using a freely available for download app called Piconhand. This app is freely available on App Store.
You need to first of all download this app and then follow the steps shown below in order to successfully upload all your pictures to Google+.
Step 1
Step 2
Step 3
Step 4
Step 5