I have a great garden patch probably 5x6, that I cram way too much into, but I'm happy with what I get. It largely feeds me (and some friends) throughout the summer. I pull up everything at the end of the year, and work in tons of compost, chicken/steer manure, and other good things like worm castings, bat guano, bone meal as I have them. But I notice every year, as the summer goes on (our summers here stretch through October) that things are getting tired, powdery mildew starts overpowering plants, even newly planted ones and things generally - even new plants - don't seem to be growing with same vigor they would in early spring. I water deeply once a week, typically followed by fertilizing with fish emulsion.
Question: I want to add a mid season boost of fertilizer and nutrients, so how do I do it? I'd like to mix a big bucket (maybe 4 gallon?) with aged manure, homemade and store bought compost, worm castings and some soil amendment/potting soil and then spread it around all the plants now. Is there any reason not to do this? I would let it stay on top and then work it in at the end of the season, with whatever else I amend the soil with at that time. Is there anything else I should add in? Perhaps more nitrogen containing material where the lettuce and peas were (and where the tomatoes and squash are now)? I also have organic tomato and vegetable fertilizer, and probably various other things lying around - trying not to buy anything more.
On the other side, I have broccoli and various peppers (mainly Padron) planted and competing for space (the broccoli was supposed to be gone by now but the side shoots have been great). Anything specific you recommend for them? Onions around the sides are doing fine and will be finishing up and out soon. The only thing new I plan on introducing is one more of each pumpkin and acorn squash, which will be planted on one side where peas were just pulled (or in center where nothing has been planted as its kind of my pathway).
Thanks for any thoughts you have.