How to fertilize Nerium oleander

Feed oleander only during its active outdoor growing season. Container guidance includes a 10-10-10 monthly example, but no universal dose or schedule is established.

Plant coveredNerium oleanderOleander · outdoor seasonal

Check for active growth

When to fertilize

What to inspect

The sources do not give one universal schedule: UF/IFAS describes one yearly fertilization, while UCANR describes 10-10-10 once a month during a container plant’s growing season. Keep the choice tied to region, container conditions and label.

What changes it

Feed only in the active outdoor growing season described by the sources. Reduce water in fall as oleander enters dormancy and do not carry a growing-season schedule into a cold, resting plant.

Follow the product label

Fertilizer type and dose

UCANR specifically names 10-10-10 for a container during the growing season. UF/IFAS does not specify a product in its yearly statement, so 10-10-10 is not a universal requirement.

No container concentration or application volume is provided. Follow the product label rather than converting an unspecified landscape dose.

Inspect a stressed plant before feeding

When not to fertilize

Warning Signs

Yellowing or weak growth alone cannot tell you whether feeding, water, roots, light, or seasonal stress is responsible. Check those conditions before changing fertilizer.

Sources