Water sparingly, allowing the soil to dry out completely between waterings. This drought-tolerant plant prefers dry conditions and is susceptible to root rot if overwatered.

Monitor soil moisture, especially in containers, and reduce watering significantly during cooler months.

Pruning is generally not required for Argemone arizonica. Remove any dead or damaged foliage at the base of the plant to maintain a tidy appearance.

Deadheading spent flowers can encourage further blooming, but is not essential for plant health.

Propagate primarily by seed. Sow seeds in well-draining soil in early spring or fall. Germination can be erratic. Some sources suggest scarification or stratification may improve germination rates.

Avoid transplanting seedlings if possible.

Repotting is rarely necessary for Argemone arizonica, as it prefers to be slightly root-bound and dislikes disturbance. If grown in a container, repot only when the plant is severely outgrowing its pot, typically every 2-3 years, using a gritty, well-draining potting mix.