I had to look up Miracle Grow Nature’s Care to see what was in it. It is coco coir with unspecified nutrients that are suppose to feed your typical house plant for up to two months.
Coco is not soil and must be treated differently. Soil requires wet/dry periods, coco should remain wet, with coco you can feed your plants several times a day. Soil supplies nutrients to the plants for a month or more, coco has no nutrients of its own so it requires feeding from the first real set of leaves. The Natures Care has added nutrients, but they may not be in the ratios required by cannabis. Coco also has “receptors” that bind with your nutrients so it’s common to block those receptors with cal-mag added to your daily feeding.
If you want to grow using coco then buy coco with or without added perlite. Forget the natures care. Coco requires buffering with cal-mag and you can buy coco pre buffered, or you can buffer it yourself and add perlite.
If you want to grow in soil then get cannabis friendly soil. There are stores near where you live that will save you a bunch of money if you buy from them rather then online. Soil is not cheap to ship and Amazon builds that price into their cost so they can ship for free. Buying locally will be less then half the price of buying online. If you don’t know where to look use the Fox Farms dealer locator that will show you stores in your area that are likely to sell cannabis friendly soil. Some big box stores sell nutrients but not soil so don’t look at those, look to the small stores that sound cannabis friendly.