I have recently started a little balcony garden. All of it in plastic containers. My balcony faces South and gets plenty of sun all day. probably too much. I water my plants quite thoroughly in the morning. Watering once a day used to be enough till now, but lately the soil gets fairly dry to touch (about an inch on top). I wonder if watering in the evening would cause root-rot or would be harmful or something. Is it okay to water the plants twice in a day?

Soil mix: Miracle-gro soil + perlite (3:1)

I am very new to gardening and really hoping somebody can help me here. Thanks!

Charul