United Kingdom 
I have a magnolia stellate which is in a pot. I was told when I bought it that it would be OK in the pot for two years. Two years has passed and I would now like to transplant it into open ground. The plant is healthy and has produced flowers each year. Does the plant require any special type of soil. I live in New Milton, Hampshire and I think my soil is more alkaline than acid. Your help and advice would be appreciated. Glenys
3 Aug, 2013
Of the magnolias, M. stellata is the most tolerant of soil type. However, shallow soils over chalk aren't the best (I should know, I grew up just south of Winchester, and we had none). What I would do is incorporate a good quantity of organic matter (not multi-purpose compost) like garden compost and some John Innes No. 3 when you plant, so that the tree gets the best possible start. It'll love it, you see. Don't forget, allow it the space to get to its full size, 2 - 3m (7 -10ft), but that is several years away.
3 Aug, 2013