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.
Digitalis (Foxglove) -- The tubular flowers attract hummingbirds, and the plants grow in full sun or part shade. I was surprised to see a hummingbird sipping on the pale yellow Digitalis lutea.That's what I call hummingbird broccoli.Eupatorium maculatum (Joe-Pye Weed) -- A native perennial that blooms in the fall.pomoea (Morning Glory) -- Hummingbirds are more attracted to the red varieties like Ipomoea luteola, but all colors are good. Ipomopsis rubra (Standing Cypress) -- Chocolate cake for hummingbirds. Liatris (Blazing Star) -- Tall spikes of purple flowers for hummingbirds and butterflies.