We have a pepper tree, about 7 to 8 feet tall, that has never been totally well but this winter it started doing especially badly.
It appears weak in general, and it is drying out from the tops. In the photo below, all the tops used to have leaves, they have all gone over the past 2-3 months.
They are exposed to constant wind, and the winter was relatively cool for the region (with low points about 10°C, 50°F). This coincided with the tree getting so much worse.
It looks like we're now in for a very hot summer, with temperatures already in the thirties C (nineties F).
We've tried watering it generously, but are at a loss what else to do. Should we use fertilizer? Does anyone have any ideas?