What age do you start giving nutrients?

A customer has a question or concerns and I hope we can get some opinions on it, thanks

“I just wanted to know, at what age do you start giving nutrients to the blueberry and white widow? I have both strains from your company and they both are auto flowering.”

It depends on the soil / growing medium you are using and the amount of nutrients already in the soil. Most of us start at the 3-4 weeks as the autos start flowering at 4 weeks