Hello, Im a new member, im 18 and im from UK.

My strawberries have gone wild. Im getting an average of 30 (yes 30) strawberries of each plant and i have about 36 plants. They are under glass. I water them every day. When i look at them now, i notice that some have a brownish orange coat, its sort of engraved lightly into the surface. What is it?

Thanks everyone!
Any questions about my gardening, please ask!