Southern magnolias prefer consistently moist soil, especially when young. Water deeply and regularly during dry periods, ensuring the soil does not become waterlogged.

Reduce watering frequency once established, but provide supplemental water during prolonged droughts to maintain plant health and promote flowering.

Prune southern magnolias primarily to shape the tree, remove dead or damaged branches, and improve air circulation. The best time to prune is after flowering in late spring or early summer.

Avoid heavy pruning, as these trees respond best to minimal intervention.

Propagate southern magnolias from seeds sown in fall or from semi-hardwood cuttings taken in summer. Seeds require stratification. Cuttings should be treated with rooting hormone and planted in a well-draining medium.

Patience is key, as propagation can be slow.

Repot young southern magnolias every 2-3 years, or when they become root-bound. Use a large pot with excellent drainage and a well-aerated, slightly acidic potting mix. Handle the root ball gently to avoid damage.

Repotting established trees is generally not recommended.