The plants are doing well in the garden this summer - but not much in the way of veggies being produced. I don't generally fertilize the garden, instead adding composted cow manure at the beginning of the growing season. However, this year I may have to add something.
When I think of fertilizers - I think of 10-10-10 - a balanced mixture of nitrogen, phosphorous, and potassium. Simply put - nitrogen gives abundant plant growth with little fruit set, but typically too much shows up as spindly leaves and growth. Too little can be evidenced by yellowing leaves. I have abundant growth - that is thick and full - not spindly.
Phosphorous - the middle number - helps with fruit set, but not if the PH of the soil is off. The growth is the kind that phosphorous supports, so I'm going to test the PH today to see what's what. Chances are I have plenty of this in the soil, since it comes from decaying organic matter, like cow manure.
As for the the last number - Potassium - the plants look sickly when there's not enough in the soil. My plants look lovely - so I don't think this is the problem.