u/GeneralTechnician732

I have 3 torenias in a coconut lined trough and have for about a month. They get about 3-4 hours of morning light then shade, facing north on a balcony. One of the three plants in the basket has really begun to struggle. I water every 2-3 days typically (when the top inch or so feels dry). First photo is of the struggling torenia then the other two for reference.