Hey, I've the very same nutes. With auto it's very important to focus on the veg stage more than the bloom. So, no, 4 wks of grow a+b and if using bloom you use a+b they work best when used together. Focus on grow nutes, root stims and micro for first 4 wks especially with autos. I tried bloom out first and it's too much N for veg. Happy growing good luck