I also used Botanicare Pure Blend Pro line. I found that Easy Ryder didn't need much nutes and a once a week feeding at 1/2 strength was more than enough. Also, I didn't feed for the first time until about 3 weeks in with 1/4 strength Grow. By the time they were ready for the next feeding, I switched to Bloom.
Do you have any pics?
I'd try to be a as accurate as possible with the nutes. Young plants burn easily if you feed them too much, too soon. There's no need to over do it. Seems like autos in particular are extra sensitive. Not saying that you are, but if you are overfeeding and burning the plants, that will definitely stunt their growth and delay flowering.