Imo you're doing too much. Adding this, doing that. Keep it simple. Add a layer of compost or wormcastings( couple inches) , spray with pesticide. I prefer something like Doctor Bonner's but any will work. Water let it be. When using the Jack's are you soaking undersides of leaves?
What nutrients do you have to use?
The dr.bonners has a peppermint soap I'll use it at 1 to 2 tablespoons a gallon of water as a preventative pest spray on outdoor plants throughout veg, every couple to 3 days. You can soak the plant entirely and throughly. Peppermint is a deteriorate soap kills, can use up to 5tbls a gallon I've never saturated plant at that application rate. Remove all leaves with eggs dont just spray. You'll know when you see it. Not saying you'll have egg on any leaves just saying in general
Wormcastings will not burn plants, it will add microbial life and a great multitude of nutrients however at minimal amounts.
Compost adds microbial life as well, also provides a multitude of nutrients at a higher rate. Depending on application rate to plant size this can burn plants.
Both of these add more to soil than listed.