I need help saving a Cape Honeysuckle that seems to be dying. It has been established for 2 years and covers a 5ft. tall by 8-ft wide space. Since the heat has kicked in the plant has begun yellowing. It was deep green and very healthy for the past 6 months. I water 3-4 times weekly for 20 minutes (about 5 gallons per watering).
Does this plant need any special nutrients I might have overlooked?