Fertilizer Help...

I found some "Miracle Grow lawn food" laying around the house and it doesnt say anything on the package telling you to keep it away from other plants. It only says "feeds all types of grasses". I dont want to fuck up my plants so i need help.
If it helps, I gave a little to a sprout and the next day it grew a few inches. You mix the lawn food in with water and water your plants with it.

Here are the nutrients it has:

Total Nitrogen = 36% (mostly urea nitrogen)

Phosphate = 6%

Soluble Potash = 6%

Iron = 0.33%___________________________________

all nuts are the same, n=n p=p Iron is Iron, just in different amounts

Ick. Plants make proteins with nitrogen. Grass is growing CONSTANTLY and needs alot of N. . . the grass you're trying to grow might get pissed if you feed it with lawn ferts, thats alot of N

The N seems a a little high for cannabis I would just use a little less than the recommended ammount. MG nutes arnt that good in general for MJ but it can be used.