To change your profile picture, you need to link (bind) your account to Facebook or Google Play. If you connect your PT account to your FB account, whenever you change your profile picture in FB, it will automatically change in PT too.
if link to Googleplay, your photo changes depending what your email photo is. After you link your PT account, It will give you the option to change your photo to your FB or Google profile pic.
When you water people’s plants, the profile photo from your FB or Google account will appear even if you don’t use it as a photo on your PT account.
ios users