First I would like to explain my credentials, I have been farming my whole life, and involved in two greenhouses, fertilizer experience is a must. First things first what kind of fertilizers are you talking about. There are tons of liguid and dry fertilizers that are complete crap, just a waste of time buying. Look at the nutrient analysis. Dry fertilizers are nice to use in the soil, as you can mix them in and they will feed as they break down. Liquids can be used in soil or foliar, meaning on the plant. When using foliar, you must be careful, because with high N rates you can burn a plant. Most fertilizers you find at stores you should have no problem with. Let me know what fertilizer you plan on using and I can break it down for you, if you want, otherwise I am not going to go into detail. Do you have access to commercial farm fertilizers...
As for flushing, I have been reading and reading on this, what is the consensence on this from other people. This is what I came up with, flushing is a waste of time. Plants all need fert. and this fert is broken down into plant enzymes. What are you flushing out.
As usual this is a discussion not a place to bash people, if you feel like calling names, save your time and keep it to yourself, I am here to learn and hopefully help the community.