What kind of soil?
all information in this post is purely fictional and must be taken as such.
dude, personally i pour at least a small amount of water on my plants every day. then i soak the whole pot every 3-4 days. that pot looks like there's a good inch of completely dry medium. roots need more moisture than once every 7 days. franco & arjan at Greenhouse Seeds say they water their plants every two days, and even allow them to completely dry out for a week or so during the middle of flowering.
that plant doesn't look that bad at all.
good luck
jimmy