Miracle grow indoor potting mix
That's what I assumed. Don't worry about it now but in the future get something different if you can. Depending on where you are located there may be different options at different places.
It's difficult to work with that soil with cannabis but there are some people that use it with decent results. You are going to need to feed but what you feed matters. The timed release fertilizer in that soil doesn't contain any micronutrients it's just NPK, calcium, and sulfur with more nitrogen than anything else. The levels of each are going to vary depending on how fast they're released which makes it difficult to add anything you need without adding too much of something you don't. It's like you have what the plant needs but you can't control what is released when the plant needs it. That works fine for many plants but cannabis can be finicky at times.
I would get something like GH FloraNova Bloom. Start feeding at 1/2 strength but not every watering. Feed-water-feed and if you start to see the tips turning brown more than they are then go to feed-water-water-feed-water-water.
I don't use that particular nutrient but have in the past. The reason I recommend it is because it contains everything. In fact you can use it from start to finish in any soil, coco, etc... You can get it on amazon for about $20 a quart.
Good luck
