I've got some herbs a few weeks ago and although I have to keep them indoor (no balcony/terrace unfortunately) they seemed pretty happy for a while. They are in front of a window receiving bright direct light a couple hours a day. However some spots have developed on their leaves these last days, and they have spread fairly quickly... could you help me identify what it is ?! The plants are mint, basil and parsley.
Thanks so much for helping me keeping them alive !!