They should say on the bottles. Thats what I go by with my advanced nutrients line. I was kind of wondering the same thing as I just flipped to 12/12 on monday.
I can help you out with 2 of them anyways. Bud Candy is weeks 1 through 6. And if sensizym is just like the product (which I think it is, can check advanced nutrients website) Grozym then I would use it with every watering throughout the entire life of your plant minus the last 2 weeks of flower. Grozym breaks down old roots to help make room for new ones. Can also be used as a foliar feed to help wash your leaves once a week.
I water one week then feed the next week. So I worked it out that my first week of flower would be water. I add grozym to every watering/feeding as well as "Prosilicate" (Grotek) (just because I have it kicking around 0-0-3) and just because I too didnt know what to do I added some super natural tea bloom (mother earth advanced nutrients) at the "mix dosage" which is about half of the "by itself dosage" because it can be used as an additive or a base nutrient. Figured it wouldnt hurt.
Technically I think I am suppose to be watering and feeding in the same week to follow a regular nutrients chart because the dosages and chemicals change every week but anyways.. I basically did a water on the first week of flower and added a little bloom just in case. Hope that helps haha