Answer: First off I apologize for the delay in answering your question. Morning glories need full sun (or at least a bare minimum of six hours of direct sun including the hour of noon) to bloom. Assuming they have enough light, make sure you are not being too nice to them and overfertilizing or overwatering. An excess of nitrogen fertilizer can cause them to grow foliage at the expense of blooms.
Magnolias also do better with ample sun, however they prefer soil that is evenly moist rather than overly dry. I hope you have been careful to water the tree as needed to keep the soil damp throughout the root area to encourage rooting while it is becoming established.
Most trees will take several years to become established and thoroughly rooted and acclimated to their new location. During that time they may not bloom very well because they are putting their strength into rooting. The larger the caliper or trunk diameter of the tree at planting time, the longer it will take to recover from transplanting.
You might want to check with your local professional nursery staff and/or county extension for help in making sure it is planted in a suitable spot and growing and rooting as would be normally expected; you might run some basic soil tests to make sure that aspect is well suited to growing a magnolia as well.
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