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.
Tweet. Anyone that has found hornworms in the vegetable garden knows they can literally destroy a plant in no time. These caterpillars can be a trifling nuisance for tomatoes, peppers, and some herbs. One hornworm can strip a plant of itâs leaves in just a few hours â they are eating machines.ou can also plant a big patch of dill as a trap crop on one end of your vegetable garden. Hornworms absolutely love dill, and might go for the dill plants instead of the tomatoes or peppers. Diversions are legal when fighting garden pests.