I've not tried dyna gro, but I've heard theyre heap and awesome.
BTW, am I supposed to be spelling it humus? Lol, probably.
Anyways, to the OP-- the more you study up and learn about nutrients the better off you will be. It can be entirely overwhelming with all of the different products out there, and knowing when to use them (at what stage of plant life) can be tricky BC they can't exactly put the directions for growing weed on the bottle.
If you're just starting out, the important thing to know is that you are going to need nitrogen for foliar (leaf) development. The sooner you get some big fan leaves, the sooner they can start working to utilize light and help the process of feeding your plant. Nitrogen is one of the big 3- nitrogen, phosphorus, and potassium (NPK). You'll need mostly nitrogen for veg, so get a "grow" formula. All nutes will have the "npk" ratio as 3 numbers, like 8-1-6, or 4-10-4 or whatever.
But your plant might also need calcium and magnesium. You can get cal/mag (it'll say it on the label) but for soil grows there are cheaper ways to get it.
Speaking of which, +rep to churchaze, my first couple of times on this site I saw someone mention that churchaze knew his nutes, and he really does.
I picked up the dolamitic lime for my soil grow- 40 pound bag was only $3.50!
BTW churchaze, how should I feed with this stuff? How soluble is it? I'm getting ready to transplant.