Ok- I checked it out, and don't follow you. If you have a plant that was cloned on April 1st... Took root and was potted on April 14th... You have a one day old veg plant (freshly rooted clone). You grow it 28 days under 24/0 (or whatever your time is) it's a 4 week old plant. Feed it like a big girl or flip it to flower and you have ended it's veg and start flowering cycle. As of may whatever date.. Count 9 weeks on your calendar, and time your feeding schedule accordingly.
I don't use house and garden, I hear they're awesome though despite the cost. I just don't see where you are getting the numbers from.. I punched in 4weeks veg 9 weeks flower and it said week 1.... Through to week 9 flower... I'd like to have been some help, but doesn't look like it this time, sorry bud- hopefully someone will know more about how your product line up works.