I have been using Fox Farm Ocean Forest for years as my base soil with no issues. It really depends on what else you are adding.
What other nutrients are you giving? Liquid chemical fertilizer?
For this go around I used the Fox Farm Trio at 1/2 to 1/4 strength (feeding every other watering), but my problem with leaves yellowing and dying never stopped and I tried just about everything. I went the first 5 weeks without nutrients as my plant was getting nute burns from Ocean Forest (and losing leaves). My new plant is the same strain, Nirvana Northern Lights Fem and its doing great in Happy frog. I also bought a Sensi CalMag supplement, but used it sparingly and it did not solve problems. I PH'd to approx 6.5 or so using General Hydroponics drops to test. ( using yellow as the color)
I've done a lot of research on Fox farm soils, and many say that it is possible to get a bad batch especially on the east coast. At my local gardening store, they really tried to get me to avoid it and recommended Coast of Maine Platinum. I was also watching a youtube video where some guy grew a bunch of different vegetables in 5 different store bought soils and guess which one roasted his plants? His exact comment was, " they must be putting something bad in the ocean forest". Who knows, but at this point my only option is to try something else which I'm doing now.
And, I DID OVERWATER. So maybe its a combination of Fox Farm ocean and my overwatering that hurt my plant. Apparently aeration in Fox farm isn't great unless you mix it hard with perlite.... Its a shame too I bought a huge bag of it which I'll probably dump outside.
Last thing, this hobby has become an obsession of mine, I'm enjoying it that much. (please excuse my excess typing)I've been dealing with what I think are fungus gnats and BTI seems to work well getting rid of them. Is it possible I have root aphids? I've spent countless hours trying to figure out the difference between the two but the flyers look very similar. All symptoms appear to be either a lockout or something like root aphids. My plant lived off eating its own leaves all the way to the end.....Luckily it didn't eat its flowers !