Plants

I spent 7 hours working on this in art class and then I found out I forgot the camera charger back in the villa(which we won't go to now )
It's my first time doing somehting like this, and the assistant wasn't very helpful
"Is this background ok?"
"No, this part doesn't look good"
"What should I do to it?"
"You gotta make the texture look good"
"...o.O so what colour should I add?"
*looks at me as if I'm supid* "You know what a texture is, right?"
"I do..." *goes away as not to be looked at that way

and THEN I have no idea what I did, I just added white to the unclean palette so it turned light green that she called "Great!" I wish she'd just tell me to add light green