its all about personal preffrance (sp?) i would wait maybe a week tops.. maybe this thursday till harvest but you could go as long as 3 weeks im guessing depending on if the weather wants to be a jag off but if you dont want a sleepy, all inhibitions down the drain couchlock stone, then wait till first frost you should go to a dollar store and pick up a magnifier lense they are like 3 bucks and get the job done nicely it will really help you with when you should harvest