I've had good luck with the EarthJuice products. They are the nastiest smelling products on the market, I swear. But, something that smells that bad must work, right? I pretty much follow their Advanced Feeding Schedule (which you can find online) - but the Grow, Bloom and Catalyst are the main 3 products (I also use the MetaK and the Microblast). Use the Grow & Catalyst during veg and Bloom & Catalyst during flowering. Currently, I'm transitioning between Grow/Bloom - so I'm using 1/2 of each. Will do that for another couple of weeks, and then switch over to just Bloom. Sounds like an ad for EarthJuice, huh? Sorry, just started using the products this year, and am VERY pleased with the results so far - so I'm a big EarthJuice fan at the moment
And, as the last post suggested, I will also top dress about 2 weeks into flowering. I use a high PK bat guano (used worm castings during veg). Not sure if you can find bat guano everywhere - but it's in every garden store around here. Good luck!