liquid kelp is mostly K. molasses does not have enough npk in to effect anything drastically. A good idea would be to spend 50 bucks or so and get some bottled organic nutes. or get some peruvian seabird guano 10-10-0 and use it with kelp and molasses. The problem with that is i don't think it will release as fast as organic bottled nutes but im not sure about that. Then again since you are so far along in flowering it might be a good idea to use floranova once or twice because it releases quick and top dress with the rest.