I don't know the particulars about Ocean Forest soils, so can't really say much about fertilizers here. The plants generally look healthy to me. I'm going to guess they are like my 2nd crop last year, which I grew in fabric pots in a homemade soil mix.
My plants seemed a lot like yours - healthy, but slow. In retrospect I think the slow growth was due to two factors: watering/fertilizing and starting too soon in large pots.
The starting too soon part was due to me sprouting the seeds in Jiffy pots and immediately putting the Jiffy pots into a (wet) 5 gallon fabric pot. I should have done a solo cup stage, but I was worried about overwatering. I was worried about over-everything since that was the main lesson from my first grow. Overwatered, over fertilized, over lighted, over-pH'd, whatever.
I had taken my 5 gallon pots outside and soaked them with a hose a day before I put the Jiffy pots in them. Big mistake. Afraid to overwater, it took 4 weeks for those pots to dry down to the point they were just moist again. At the same time the roots were developing, but slowly since they a) hit layers of water, and b) needed to fill up a huge pot.
I think - in general - that a lot of root growth could be taking place and that your plants will take off just fine and are already starting to do so. You might turn up lighting intensity a bit and fertilize a bit more too.
My plants started off very slowly for the first month. (Also, I didn't fertilize them - fear of overdoing.) I started them May 1, flipped to flower Aug 12 and harvested Oct 10. In a 4x4 with 5 plants, I ended up with 18 ounces of dried buds. It just took a while. That's an advantage of photo periods over autos - you can recover from problems by giving them more time.