White dry film on marijuana

A question from a fellow grower:

I am growing my first two plants :wink:
There is something on the leaves of one plant specifically that I am hoping you can help me with?
It is a flaky white dry film???
Looked like a continuation of crystalline at first?
Iโ€™m so sad :frowning:
I ordered some seeds, I want to get this down before I start again. I am growing in pots in a greenhouse. Is there something I can do to cleanse in the flowering stage that is not toxic or??

You can rinse them with plain cool water, just be sure they donโ€™t stay wet. I have no clue as to what the white film might be with as little as you have told us of the environment. Maybe Latewood would have an idea as he has a lot of greenhouse experience.