Water petunias regularly, allowing the soil to dry slightly between waterings. Avoid overwatering, which can lead to root rot. Ensure good drainage in pots or garden beds.

During hot, dry periods, more frequent watering may be necessary to keep plants hydrated and blooming vigorously.

Pinch back the tips of young petunia plants to encourage bushier growth. Deadhead spent flowers regularly to promote continuous blooming and prevent seed formation.

If plants become leggy, prune them back by about one-third to stimulate new growth and a more compact form.

Petunias are most commonly propagated by seeds sown indoors 6-8 weeks before the last frost. Cuttings can also be taken from healthy, non-flowering stems in late spring or summer and rooted in moist potting mix or water.

Seeds require light for germination.

Repot petunias when they become root-bound, typically in spring as new growth begins. Choose a pot that is only slightly larger than the current one, ensuring it has drainage holes. Use a well-draining potting mix.

Gently loosen the roots before placing the plant in the new container.