Answer: Yellow magnolia is a rounded or conical shaped tree that can grow up to 30' tall with a spread of about 20'. It has yellow flowers with petals that are 6". The leaves are coarse and oval. The buds are large and fuzzy. Branching is dense when young, later opening, or may be lightly pruned to open. It is grown for its large yellow flowers as a shrubby specimen tree or in mixed plantings. It prefers to grow in full sun in rich, moist, well-draining soils. It sounds as though you're giving it good care in terms of watering and sunlight exposure so I think the yellowing foliage indicates a need for fertilizer. We generally recommend that you begin fertilizing as your magnolia as it is leafing out. A balanced fertilizer with equal parts nitrogen, phosphorous and potassium applied annually will help keep it healthy. Use a granular, slow release fertilizer that will nourish the plant as it grows throughout the season. The spring after planting is a good time to begin fertilizing. Hope your magnolia recovers and begins blooming for you!
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