Answer: This tree needs soil that is organic and acidic, and evenly moist -- yet well drained, meaning damp like a wrung out sponge rather than sopping wet or saturated. Yellow lower leaves and burned edges can be a sign of over watering and based on your description, I think you may be keeping the soil too wet. To know if you need to water, dig into the soil with your finger. If it is still damp you do not need to water yet. When you do water, water slowly and thoroughly so it soaks down to encourage deep roots. (It is better to water deeply less often than lightly every day.) After watering, wait a few hours and then dig down to see how far the water went; sometimes it can be surprising. Since this is a new tree I would also suggest you consult with the professional nursery staff where you purchased the tree, just to be sure. Enjoy your magnolia!
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