whitebark magnolia

Whitebark magnolia plants should be watered once or twice a week, depending on the weather and the season. During the warmer summer months, water the root zone deeply in order to avoid dehydration and to simulate its natural environment. During the winter, water less often with less water. Aim to keep the soil slightly damp – not dry or soaked. If the soil remains excessively dry, it can cause the plant’s leaves to yellow and drop prematurely.

Whitebark magnolias (Magnolia obovata) do best in bright, indirect sunlight throughout the year. During summer months, the tree can tolerate direct sunlight for a few hours in the morning and a few hours in the late afternoon and evening, but should be sheltered from the midday sun. During winter months, morning sunlight is preferred. If the tree is grown in an area with intense summer heat, provide complete shade in the summer. To avoid scorching of the leaves, an area with ample sun protection is a must.

Whitebark Magnolia should be pruned at least once a year in late winter. Pruning should be kept to a minimum—only 1/3 of the total canopy should be removed. Removing too much foliage can leave the tree vulnerable to sunscorch and thin out new growth. To prevent over pruning, wait until after flowering to prune. Selectively prune healthy branches while removing dead, diseased, crossed, or broken limbs. Prune branches that are rubbing together, or that are close to the trunk. Prune back leggy branches and branches that are crowding each other in order to maintain an open crown. However, do not prune excessively as this may cause significant damage and shape changes.