Keep the soil consistently moist, especially during active growth. Water thoroughly when the top centimeter of soil feels dry. Avoid waterlogging, as this can lead to root rot.

Reduce watering slightly in cooler periods, but do not let the plant completely dry out.

Regular pinching of the growing tips encourages bushier growth and more flowers. Deadhead spent blooms to prevent self-seeding and prolong flowering. Remove any leggy or unhealthy stems.

Light pruning can be done anytime to maintain shape and encourage new growth.

Gallant Soldier is easily propagated from seeds, which germinate readily in warm, moist conditions. Sow seeds directly into the garden or pots in spring after the last frost.

It can also be propagated from stem cuttings taken during the growing season.

As a fast-growing annual, Gallant Soldier typically does not require frequent repotting. If grown in a container and it becomes root-bound, repot into a slightly larger container in spring.

Use a well-draining potting mix. For garden settings, it's usually planted directly.