my sky pencil holly is turning brown on one side
my holly is turning brown what is wrong with it and what can i do for it to make it healthy?
This is, most usually, caused by fungal damage. I would apply wettable sulfur dolomitic lime to the area to correct the issue. It could be all the way until spring before it recovers correctly, but this usually takes care of it.
This article will refresh you on the care of these: https://www.gardeningknowhow.com/ornamental/shrubs/holly/care-of-sky-pencil-holly.htm