Southern magnolia can be grown in sun or shade. It prefers moist, well-drained, acidic soils. Container-grown Southern magnolias can be planted successfully any time of year. Balled-and burlapped trees are usually transplanted from August to October. Don't be alarmed if the tree sheds an unusually large number of leaves during the first growing season.
Transplant shock is common with Southern magnolia.
If possible, dig the planting hole at least two times wider and as deep as the root ball. Be certain the top of the root ball is level with the soil surface, then backfill with the native soil after breaking apart clods and removing stones or other debris. Water thoroughly to settle the soil. Finally, apply three to five inches of mulch on the soil surface to conserve moisture and to prevent weeds. Wait until the tree is established and putting forth new growth before fertilizing.