Petunias thrive with consistent moisture but dislike waterlogged soil. Water thoroughly when the top inch of soil feels dry. In hot weather, they may require daily watering.

Reduce watering slightly in cooler periods, allowing the soil to dry out a bit more between waterings to prevent root rot.

Regular pinching and deadheading are crucial for continuous flowering. Pinch back young plants to encourage bushier growth.

Once established, remove spent blooms to prevent seed formation, which diverts energy from new flower production. Light pruning can also shape leggy plants.

Petunia x atkinsiana is typically propagated by seeds or stem cuttings. Seeds are sown indoors in early spring, requiring warmth and light.

Cuttings are taken from healthy plants in late summer or early fall, rooted in a moist, well-draining medium, and overwintered in frost-free conditions.

Repot petunias when they become root-bound, usually annually or when plants outgrow their containers. Choose a pot that is only slightly larger than the current one. Use a well-draining potting mix.

Repotting is best done in spring before active growth begins.