I highly advise staying away from fox farm products, especially their growing mediums. Not only are they overpriced for the quantity and quality of ingredients, their soil is often toxic to plants.
Last few bags of happy frog I bought in Oregon had a ph of 4.3, and the soil mix was about 10% thumbnail size river rocks. This is standard across the board for their soil mixes.
If you're in the PNW I highly suggest checking out E.B. Stone Edna's best potting soil or 420 mix if you can find it. The 420 mix is absolutely amazing quality.
Roots organics is also a great soil company. I used their Lush potting soil last year and wow am I impressed with the quality. Very minimal nute problems with some big plants in small pots outdoors. Normally that would have been quite the struggle.
either the E.B. Stone 420 mix or the ROOTS Lush are a great stand alone or base for building your own organic soil.
But please, do not give your money and frustration to Fox Farms. They produce a garbage product and have terrible customer service.