I apologize for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
Magnolias go through periods of new growth followed by periods where they seem to be just there with no new shoots. As long as the tree appears healthy I would not worry about it. A light application of lawn fertilizer would be fine and may help initiate a little new vigor. Apply about a cup per 50 square feet of soil surface area beneath and just beyond the plant's foliage canopy.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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