When growing oleander in containers, it’s important to give them plenty of sun and adequate water. Although they can handle drought conditions when planted in the ground, container grown oleanders should be watered frequently. They will survive in some shade, but they won’t produce blossoms as spectacularly as in full sun.
Feed your plants with a simple fertilizer every other week from spring until late summer. Use a high potassium fertilizer in high summer to ensure the best possible blooming season. When temperatures start falling in late summer, bring your container grown oleanders indoors.
The best time to prune oleander plants is right after they have finished blooming.