Hey Growmie,
I Saw you were using coco for your grow, which doesn't have any kind of nutrients in it and I didn't see anything about adding dry amendments, so yes I would start nutrient feeding. I also would only go with 1/8 to 1/4 strength on the nutrients autoflowers are really sensitive to overfeeding. Feel free to shoot me a holler if you ever need any help, I'd be honored to assist you. Hopefully, this was helpful, and remember ... "Happy Growing" and "Free your mind one puff at a time".