What purpose were you thinking of for doing this? I have only done this when they have been overfertilized.
In the hottest driest time of summer I have to really soak the pots so they don't dry out, but otherwise too much water will drown the roots.
When using most chemical fertilizers, you should flush every now and then with straight water to help eliminate nutrient salt build up
i would do it just to be safe rather than have your plants die or get set back. what i do is i take regualar PH adjusted water and water till some water flows out the bottom, then i havea separte watering can with Fert, wait a few min then water again withsome Ph water to push the ferts into the root zone. and i feed with 1/2 strengh fert every time. so far so goodI use Botanicare pro bloom. So would I need to flush when using this fert?
i water enough that the salts are flushed out
i am growing in pots on a cement slab
i am more worried about the irrigation police busting me for the runoff
than i am about some unsightly build up
just because i am paranoid does not mean they are not out to get me
please provide a picture of the plants that look like they need flushing
or please provide a picture of any one plant that indicated it might like some of that?