Hey there, graz that you made it despite the miners. Regarding to this, 2 things come to mind: you could use beneficial organisms on the one hand, ichneumon for example which i don't if works cause outddor and second u can make dung water from nettles which u have to ferment for a week or so.
I used dung water with nettles successful against a thrips plague with plants i prepared on the terrace for a guerilla grow. They went away completely. I spayed the plants with it and also let them soak the dung water. additionally added onionskin and some garlic. After some hours i washed the leaves.
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