This may sound like a pointless question, but did you also accidentally buy potting mix instead of soil? That would be convenient, and it's a very common mistake.
If you decide to use the jack's hydroponic in a hydro medium, you will also need to buy calcium nitrate (I recommend yara brand since it's the same as jack's calcium nitrate, but 1/4 the price).
If it's a peat moss based potting mix, that's actually a hydroponic medium. If it's miracle grow, they will have fortified it with nutrients, but after they run out, it's a hydroponic medium.
You can basically treat peat moss based potting mix similar to coco. (nutrients with every watering). What makes something a soil is clay and silt.
I seed in promix potting mix.
After sexing for females, wash roots and transplant in Hydro system using turface.
The same Jacks Hydroponic/Cal Nitrate ratio of 2 to 1 at an EC of 1.2 is used for the plants life.
No flushes. No issues.
Besides Yara brand Cal NItrate; Southern Ag also has an offering.