1st grow bubblegum auto

Starting to smell pretty strong at this point. I think I did have a bit of nutrient burn and had to flush with water. I'm not sure if I should start them again as it should be done soon. Some of the leaves are turning yellow which I'm hoping is a sign of the end of life and not something else. Fast buds says 8-9 weeks but I'm thinking it'll be a couple longer as it doesn't seem that mature to me.