A number of problems can cause a plant's leaves to turn yellow, such as too much sun, lack of nitrogen, iron chlorosis or pest infestations, depending on the type of plant and its current habitat. number of problems can cause a plant's leaves to turn yellow, such as too much sun, lack of nitrogen, iron chlorosis or pest infestations, depending on the type of plant and its current habitat.
Plumbago plants, also known as plumbago auriculata or cape leadwort, grow well in warm climates. They are a great addition to a garden, as they attract butterflies and are ignored by deer. Plumbagos are bushy plants that can grow 3-10 feet high and just as wide, according to Gardening Central.
Plumbago will grow in a cascade down retaining walls. Blue plumbago (Plumbago auriculata) is an evergreen shrub that is native to South Africa, but grows in U.S. Department of Agriculture plant hardiness zones 8 through 11. With long, thin stems and pale blue flowers, itâs prized as a shrub, climber, potted plant and groundcover.