White Rhino. When?

I have been growing Sour Diesel & White Rhino. Its week 9, and while the Diesel is about 40% amber or yellowish. The Rhino is still completely white. From what I understand, these are both 10 week strains. So, when should I expect the Rhino buds to turn color?

If your a Rhino grower, plz get specific about this strain. Im a newbie, and I dont want to leave anything to chance.

Thanx,