Oleander shrub is a flowering plant that is native to the Mediterranean region. It is a member of the family Apocynaceae, which also includes the periwinkle and the echium plant. The oleander shrub is a evergreen shrub or small tree that can grow to a height of 6-8 m (20-26 ft). The leaves are dark green and leathery, and the flowers are white, pink, or red. The oleander shrub is poisonous, and all parts of the plant contain toxic compounds.
Related plant:
Oleander Tree
About soil condition, Oleander shrub can grow in many different types of soil, but prefer well-drained, loamy soil. They are not particular about pH and will do well in both acidic and alkaline soils. They are also tolerant of salt and will do well in coastal conditions.
Not too different with other plants, oleander shrubs need sunlight to grow. They will do best in an area that gets six to eight hours of sunlight each day. If you live in an area with hot summers, it's best to plant your oleander in a spot that gets some afternoon shade.
The temperature condition that is most ideal for oleander shrubs is one that is warm and sunny. They thrive in these conditions and produce the most beautiful blooms. If the temperature is too cold, the shrubs will not bloom as well.
Ideal humidity condition for this plant is 50% or below, anything above that will start to cause the leaves to droop. If the leaves droop, cut back on watering and increase the amount of air circulation around the plant. If the leaves start to turn yellow, that is a sign of too much water.
Mentioning fertilizer, this family of plant is known to be heavy feeders. During the growing season, it is important to fertilize oleander shrubs every few weeks. However, be sure to use a fertilizer that is low in nitrogen. Too much nitrogen will result in lots of foliage growth, but few flowers. When it comes to watering, oleander shrubs are drought tolerant once established. However, during the first year or two, they will need to be watered regularly, especially during hot, dry periods. When it comes to planting, oleander shrubs do best in full sun. They are not particular about soil type, but they do prefer well-drained soil. When planting, be sure to dig a hole that is twice the width of the root ball.
Pruning oleander shrubs is a necessary part of keeping them healthy and looking their best. It is best to prune in late winter or early spring, before new growth begins. You should remove any dead or diseased wood, as well as any crossing or rubbing branches. branches. You should also cut back any overly long or straggly branches.
Propagation is generally done by taking cuttings from the desired plant. The cutting should be about 4-6 inches in length and should be taken from new growth. The cutting should be placed in water or moistened soil and left in a bright, warm location. Once the cutting has rooted, it can be transplanted into a pot or into the ground.
Usually, the plant growth rate is fast, with some species growing as much as 3 feet in one season. With regular watering, full sun and well-drained soil, your oleander will likely thrive. Fertilize twice a year with a balanced fertilizer for best results. Pruning is not necessary, but can be done to shape the shrub.
Common problems for this kind of plant are root rot and stem dieback. Root rot is caused by overwatering or poor drainage, which leads to the plant's roots being unable to get the oxygen they need. Stem dieback is usually caused by pests or diseases, which attack the plant's stems and leaves.
Source:
To Oleander or Not to Oleander | Cochise County Master Gardeners
Nerium oleander - University of California, Berkeley
Oleander Aphid | NC State Extension Publications
