CIL Shrub and Evergreen 10-3-6. Most the info I find on feeding marijuana nutrients only refers to liquid fertilizers
CIL appears to be from the same company that makes Pro-Mix medium. That's a reputable source. And the NPK ratio is good for veg. I don't know about the micros. I couldn't find a the label showing that info. Is it time release? (I see people talking about Osmocote which is TR.).
You don't need cannabis-specific nutrients. You just pay a premium for the stuff. Lots of people use inexpensive JR Peters "Jacks". I use Grow More Sea Grow (quite a few on a different forum use it). It's mostly just the NPK ratio. 3-1-2 in veg (which your CIL is close to). In flower you'll want 1-1-2 to 1-3-2. I wouldn't go that high in P until the very end as a booster. I'd try to be at around 1-1-2 to 1-2-2.
There are people who grow 1-1-1 all the way. Cannabis isn't very complicated.
As far as amount to use, if it's not time-release, I'd do 1/4 tsp/gal the first time, 10 days after seeds break ground. Then 1/2 tsp/gal the rest of veg. I'm basing that dose on the strength of the product. I use 16-16-16 and do 1/2 tsp/gal. So, you should be safe. If anything, you may want to push it up to 3/4 tsp/gal if it doesn't seem to thrive. (But, you have to be careful of salt buildup in the soil if you feed too much. If you feed enough to generate over 20% runoff each time, you'll have less risk of buildup. That's handy if you're not sure where you're at.).
Buy Jack's Classic Bloom Booster. It's 1-3-2. You can combine it with your 3-1-2 to get a ratio in between during transition and early flower. You don't have to jump abruptly to 1-3-2. (In fact, if you're unsure of your CIL 3-1-2 product, buy Jack's Citrus Feed which is 2-1-2. That's a good veg ratio. There are people on RIU using it. It's inexpensive.).