>>598078Well it depends. I had a mistreated rosemary that stood pretty much soaked in water for 6 weeks (don't ask why) and at that point it "only" had some yellow needles with brown tip, so not much visible above-ground damage.
However, even after planting it out and keeping it mostly dry, it continued to have more and more needles turning yellow/brown, it took weeks for the "yellowing rate" to go down again, about 2 months until new yellowing of needles more or less stopped, and only now after 3 and a half months, there's some slight signs of recovery (it starts flowering now for some reason in late September, WTF)
So the roots must already have been really fucked up before it showed up on the leaves
Therefore I'm sorry to say that you shouldn't keep your hopes up too high, but you can try of course. You could also un-root it carefully by rinsing the soil from the roots, and check if there's any white parts left (rooten roots will be brown and mushy), only then you have a chance by cutting the rotten parts away and pruning above at the same time - the more roots you cut away, the more you have to prune above ground
