Don't have personal experience with
![FF FF FF](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
nutes. Generally most folks start using nutes from day 10 or 14. It depends on what kind of soil you are using. If it's rich in nutrients itself (AKA "hot") you may want to start on day 20 or even 30. If you have a "light" soil, day 14 is usually way to go. Also, remember this: overfeeding plants with nutrients is number one mistake most first time growers make. Less is more. Nutrients are not food for your plants, light is. Also, don't overwater them and you'll be totally fine. You may wanna ask fellows who use Fox Farm nutes (there is a nute section here somewhere).