Based on recommendations from 365ers, I am trying to take manual control of white balance. To do that I have to use an app called Camera+. Here is the plant with white background.
Well, you certainly did well following that advise! (By the way, I was once told by a professional photographer not to "worry" about white balance as it is one of the easier things to effect changes in post. Not sure I agree, but thought I'd let you know.)
I remember using that app when i had my iphone.