Well, let's look at the names of the products, shall we?
Grow = veg state
Bloom = flowering state
These products are supposed to be used at different times of a grow because the plant needs different things at different stages of growing. While I'm sure you could mix things up, I think the plant would be super confused if you did that. And over-nuted, to be sure.
Yes, call the company and ask them how you use their products. You paid them money, they should be able to explain how things work. Or at the very least, you could talk to the guys at a hydro or gardening store about what to use and when to use it.
Try these sites too for more info on growing and growing products...
http://www.hydroponicmedicalgrower.com
http://www.thehydroponicreview.com/
good luck!!!!!