I have two mandevilla plants. One faces the south and one to the north. The one on the north side has that leaves are turning yellow and dropping off. Also, some of the plant seems to be dying and both have received the same care. Any help would be appreciated.
If they are in the same area, and everything else is the same, the one facing north might appreciate more sun. Mandevilla tolerate full sun, but do best with dappled sun or light shade from 12 noon to 5pm. A few yellow leaves at the bottom of the plant is normal.