Oleander is an attractive shrub or small tree for the flower garden. He wears large fragrant pink, white, red, yellow or orange flowers, but must be used cautiously around the house, because it is very poisonous. Oleander are warm-climate plants, but they can tolerate temperatures between 15 and 20 degrees Fahrenheit for short periods. Oleander is resistant to most diseases can, but cold damage, prolonged drought and some pest insects leaves to curl.
Oleander grows primarily as a large shrub but can be trained into a small multi-stemmed tree. The plant can be 10 to 18 meters high very quickly so. 2 meters per year growth The long, slender leaves are evergreen, leathery, 4-6 cm long can be, but only 1 inch wide. The natural form is a mounded shrub and can spread up to 15 feet in width. The colorful flowers can single or double petaled 2-inch flowers produced from early summer to late autumn to be.
Oleander bushes or trees tolerate soils that most other plants would find unpalatable. The system performs well in periods of drought, but also thrive in moist soil as long as it drains well. However, the total lack of moisture will cause damage to leaves. Oleander is a plant for full sun location and has a moderate salt tolerance. It is grown in warm coastal regions with good levels of success and is for gardens, parks, sidewalks, containers and suitable for display. Oleander is not damaged by the wind and is easy to cultivate. In cold climates, where the plant is exposed to temperatures below freezing, leaves may curl and eventually fall off.
Sucking insects are the primary pests oleanders. Aphids are insects, molluscs, suck plant sap and cause leaf curl and loss of plant vigor. The oleander aphid is 1/8 to 1/16 inch long and yellow with black markings. They are usually seen in dry conditions. Cicadas also cause leaf curl and are vectors for a bacterial disease that causes oleander leaf scorch. Leafhopper feeding behavior causes leaves to deform and shrink herself.
Oleander leaf curl often have stress due to conditions that are too dry, too wet, eutrophication and transplant shock. Good care of the plant is often the cure for leaf curl. Oleander is only hardy occur in U.S. Department of Agriculture zones 9 to 11 and some cold damage can be in the zone 9a. Although oleander is drought tolerant, it performs best with infrequent but deep watering. Leaf curl when accompanied by yellowing on the tips of the blades, it will probably be cured by irrigation.