Hi. I’ve bought my dream tree, a magnolia, and it is living in a very large slate container due to not having anywhere I can plant it. It’s on a balcony that gets the sun a large part of the day ( east facing ) and I’ve bought everything the garden centre recommended. I’ve moved it to it’s big pot, watered it and been told it will be fine. Does anyone have any idea what to do to keep it alive and healthy in a tub? I’d be heartbroken if it died! Thank you in advance 