I agree with Elaine, morning is best. If you can't do that then you have to do what you can. Watering isn't something that is done on a schedule, especially with outdoor plants in pots, because the weather and therefore water needs vary.
What concerns me in the picture is that the collapsed green leaves appear to be the youngest ones. It may be a camera illusion but there doesn't seem to be much space between the top of the media and the top of the pot for watering, and there also looks to be a gap between the media and the side of the pot as if it has shrunken inwards. If true then I wonder if it's been getting enough water. Does the pot feel light for its size if you lift it?
Just curious, is there a reason for growing it in a pot as opposed to in the ground?
