When you feed your plants all these nutes the grow stores are making a living off of, salt builds up on your roots. When your roots start to salt burn, they lock up and stop taking in what you are feeding to begin with. I always found that flushing your plants (10-15 gallons drainage,either with a flushing agent or straight water) when you switch their feeding program (from veg to flower) will greatly increase the ability for your plant to take in those nutes and actually take in what you want them to get. Get rid of the veg juice before you switch them to bloom so they are not eating up that old veg stuff locked up in the dirt and roots and give them a good clean so they are at full "eating" potential when you want them to start budding. A quick start to bud production will always lead to a bigger yield. Hope this helps I found a noticeable difference in the production of my plants after I started flushing them before flower.