Planting Magnolia soulangeana Will perform best if planted in full sun and sheltered from cold winds. Choose a well-drained site. Dig over the soil area before planting and add plenty of humus or well-rotted compost.Click to see full answer. Similarly, it is asked, where is the best place to plant a magnolia tree?Magnolias prefer a spot in the garden that receives full sun to light shade. That said, if you live in a particularly warm or dry climate, your magnolia might benefit from a location shaded from the hot afternoon sun.Likewise, where do magnolia trees grow in the UK? MAGNOLIAS FOR THE UK They prefer full sun throughout the year but will also grow well in light shade for part of the day. Some varieties are well suited to growing in containers. Different varieties range from a height 2.5m / 8ft and spread 2.5m / 8ft up to 20m /63ft height and spread. In this regard, how fast does Magnolia Soulangeana grow? 1). Growth rate is moderately fast but slows down considerably as the tree reaches about 20-years of age. Young trees are distinctly upright, becoming more oval, then round by 10 years of age.Is Magnolia fast growing?Southern magnolias grow from 1 to 2 feet a year, reaching 60 to 80 feet tall with canopies spreading 30 to 50 feet wide. This is rated as a slow-to-medium rate of growth, but how fast a tree will grow varies with the cultivar and growing conditions.