This is answered comprehensively here. Keeping this in consideration, what month do oleanders bloom?
From Top to Bottom. Although its typical bloom season is summer through early fall, oleander may bloom year-round in frost-free areas within U.S. Department of Agriculture plant hardiness zones 8 through 10.
Similarly, do Oleanders need deadheading? Shrubs that bloom over longer periods and summer-flowering shrubs, like rose and oleander, respond best to deadheading, but this practice does not extend the flowering time of perennials that bloom over a brief period or of shrubs such as azaleas or hydrangeas, which bloom from a set number of buds.
Also Know, what is the best fertilizer for oleanders?
Oleanders are high water users and love fertilizer. They do not like to be watered daily and do their best if the soil does not dry excessively between waterings. Use a complete fertilizer such as Peters or Miracle-Gro for flowering plants and water it into the soil about once every six to eight weeks.
Do Oleanders need a lot of water?
An oleander shrub needs 1 to 2 inches of water each week while it is actively growing. Let the soil dry out between waterings.