Water Forsythia suspensa regularly, especially during dry spells, to maintain consistently moist soil. Avoid waterlogged conditions, which can lead to root rot.

Allow the top few centimeters of soil to dry out between waterings for established plants. Young plants benefit from more frequent watering.

Prune Forsythia suspensa immediately after flowering to maintain its shape and encourage more blooms next year. Remove any dead, damaged, or crossing branches.

For rejuvenation, severe pruning can be done in late winter or early spring, cutting back old stems to near ground level.

Propagate Forsythia suspensa by taking softwood cuttings in late spring or semi-hardwood cuttings in mid-summer. Dip the cut end in rooting hormone and insert into a well-draining potting mix.

Keep the cuttings moist and provide bottom heat for best results. Seeds can also be sown in autumn.

Repotting is generally not necessary for established outdoor Forsythia suspensa plants as they are vigorous growers. If grown in containers, repot every 2-3 years in early spring.

Choose a pot only slightly larger than the current one and use a good quality, well-draining potting mix.