Italian alder prefers consistently moist soil. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogging, as it can lead to root rot. In drier climates or during hot spells, increase watering frequency.

Ensure good drainage to prevent issues.

Prune Italian alder to maintain shape, remove dead or damaged branches, and improve air circulation. The best time for pruning is typically in late winter or early spring before bud break.

Heavy pruning can be done after flowering if necessary. Focus on structural pruning when young.

Italian alder can be propagated from seed sown in autumn or stratified seeds sown in spring. It can also be propagated from semi-hardwood cuttings taken in summer.

Ensure cuttings are treated with rooting hormone and kept in a humid environment until established.

Repotting is generally not necessary for established Alnus cordata trees, as they are typically planted directly in the ground.

For container-grown specimens, repotting every 2-3 years in spring may be beneficial if root-bound. Use a well-draining soil mix.