i dont grow i soil but ive sold tons of Foxfarm (literally) and ive heard just as many users say that Ocean Forest  never gave them any problems as have said that it is too hot. I know a few things about Ocean Forest. first off it is chocked full of nutrients. Crab meal, shrimp meal, fish emulsion, bat guano, Humic acid, fulvic acid, oyster shells for aeration... so it is JACKED with nutrients. 

Nevertheless if you look right on the bag it states that it is fine for seedlings