Hello again. I got such good response for being new and thank you for that. I have looked around before I ask this question but until I get the navigation down for this site, I am trying out these botanicare CNS17. And the guy at my grow store told me I could use it for the vegetation period but that was before I went auto with it. Does any one have an idea where I can find an answer for how soon and for how long can I use these nutrients, or some one could just reply with an answer. Either way thanks for any help.