You need to test if just the foliage was affected or if the stems themselves are dried up too. To test this you literally just snap off stems to see if there's any green inside. If stems are dry then you have to prune off whatever is dead to allow new growth to happen. You could take this opportunity to trim this boxwood back off the concrete (?).
Partially dead Japanese Boxwood Help!!!
So last year, they pressure washed my concrete near the pool…and maybe some bleach/chlorine or saltwater from the pool went near my Japanese boxwood bush…
only the end of it “died.” I’m not sure if it’s dead or not, there was many brown leaves that fell off, but in the middle, there is some green leaves…
what should I do?? Cut off the whole dead section including the green?? Will it fix itself or regrow?? Anyone have a similar experience?
I just tried putting 10-10-10 fertilizer and milorganite on it yesterday…
thanks!!!!
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only the end of it “died.” I’m not sure if it’s dead or not, there was many brown leaves that fell off, but in the middle, there is some green leaves…
what should I do?? Cut off the whole dead section including the green?? Will it fix itself or regrow?? Anyone have a similar experience?
I just tried putting 10-10-10 fertilizer and milorganite on it yesterday…
thanks!!!!
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I snapped it, and it looks like it’s dead 
When u say trim the boxwood off the concrete…can I do a hard reduction and reduce it past the green leaves? Or will this kill the plant? It has overgrown wayyy past the concrete…thanks for responding!!!!
When u say trim the boxwood off the concrete…can I do a hard reduction and reduce it past the green leaves? Or will this kill the plant? It has overgrown wayyy past the concrete…thanks for responding!!!!
You won’t kill the plant by trimming it back, at least not in the spring. It’s not typically done because the green growth is only on the extremities of the stems so you see the ugliness of you take too much off. But in your case you’re already there. Take some pruners and snip off whatever beaches are dead,as deep as you want to go! Or you can do what my wife does - I have to walk away when she does this though & regret the day I handed over the hedge trimmers to her… but she literally gets in there with those things and reduces the shrub to stumps!!! I’m not sure if there’s some supernatural favor on her but those darn bushes come back with so much vigor I’m tempted to try it too! Still kinda scared tho 😬. I’m a pruner guy, one branch at a time, and then give it shape with the hedge clippers.I snapped it, and it looks like it’s dead
When u say trim the boxwood off the concrete…can I do a hard reduction and reduce it past the green leaves? Or will this kill the plant? It has overgrown wayyy past the concrete…thanks for responding!!!!
Here’s an example of her work on gardenias. They’re matiure plants, about 4 years old and should handle this level of cutback (I hope).. but she didn’t like the winter kill damage on them and how they were not growing in uniform so she “trimmed” them back a few inches. Or was it feet?! I walked away, didn’t want to be an accomplice to this crime but I’m already seeing green budding on the branches. Rain & fertilizer should help it grow back.
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