The real test is to see if they can bud out... much more difficult to grow flower than leaf. That will be the real test of your recipe.
Eventually all the chemical will flush out but that will take more time than just a simple flush will provide... if you flush it well enough you might not notice any chemical taste or effect in the bud. Of course any organic nutrient you add in will be organic, it's just the residue left behind by the chemicals that will make it not.
Where did you find that science there?
I'd be curious to find out how you "flush" chemicals out of a plant or even soil?
Lets say you were in hydro. Yes the plant will uptake the soluble nutrients she requires and will leave the rest in the solution. Not so much in soil.
The plant still uptakes required nutrients (as long as enough moisture in soil).
The rest is left behind. There's a thing called cation exchange capacity of soil.
This is how flushing soil of any nutrients just doesn't happen.
You may be able to have excess soluble Nitrogen run off but that's it and it has to be a lot of excess. There will still remain plenty of N in the soil.
Think famers loading a field with manure (or chemical nitrates) followed by a lot of rain. Field would have to be fallow and not much cover crop (live roots in soil).
The outdoor bin where I throw all the green garbage from kitchen left overs is teeming with earthworms. They absolutely love the compost nutrients. I grab a shovel full and put in the bottom of a hole when transplanting... gives em a good start but you may still have to amend with more specific fertilizers like blood and bone to have really nice growth.
You can top dress with EWC/verimi-compost as much as you want.
Compost/ewc is part of the humus portion of a soil mix. So the other amendments tco any deficits.
Add your kelp meal with your compost. Now you have something that will grow a plant without deficits.
Kelp meal has over 70 trace minerals - there's more than whats on your test report. They don't test for all of them. More than Alfalfa. Kelp has every macro and micro nutrient in the proper proportions for plants to thrive and grow.
Plants need sulfur. IF there was too much sulfur it would affect the pH. You can see that its somewhat acidic by itself.
Once incorporated with humus this becomes a non-issue.
I don't use alfalfa meal in my soil mix any more. It's too hot as it breaks down. I put it in my compost bins and let the worms eat it. Problems solved. Can also use rabbit poop - thats all rabbits eat (alfalfa pellets), the poop you could probably grow in it.
Should test rabbit poop. Be an interesting test.
Blood meal. Are there any leftover anti-biotics in the blood meal?
Not a vegetarian here but thinking there are better choices. Fish bone meal is a good one. Food for thought.
Here's an interesting report - can be used to choose your preferred amendments.