Mark, whatever the soil test results are, I think you should still try a few plants in that black dirt of yours with no added fertilizer, as a control. I get the feeling that if I had sent mine in, the test would have told me I was deficient in something.
I agree that for hydro plants, science has it figured out and can tell you exactly what plants require. But soil biology throws in so many complex variables that it is nearly impossible to get one correct answer to the question of what a plant needs.
Here's a pic of fruit set on a dwarf plant from last summer. Once again, back to the thread title, this past season I learned that I don't need fertilizer.
|