Mirabilis aggregata prefers consistently moist soil but can tolerate brief dry spells. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.

Reduce watering slightly in cooler months or when the plant is dormant.

Prune Mirabilis aggregata in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches to maintain a tidy shape and encourage robust flowering.

Pinch back young shoots to promote bushier growth and more blooms throughout the season.

Mirabilis aggregata can be propagated from seeds sown in spring or through stem cuttings taken in late spring or early summer.

Seeds can be sown directly outdoors after the last frost or started indoors a few weeks prior. Cuttings root easily in moist, well-draining potting mix.

Repot Mirabilis aggregata every 2-3 years in spring as needed. Choose a pot that is only slightly larger than the current one, ensuring it has adequate drainage holes.

Use a well-draining potting mix, such as a blend of potting soil and perlite or sand, to prevent waterlogging.