Genie Magnolia w/yellow leaves
Silver Spring, MD. I have a 2 year-old genie magnolia that has its leaves suddenly turning yellow and dying. Started about 7-10 days ago. Receives full sun. Completely healthy until now, including blooms this spring. Went about 4-5 days w/out water a week ago (out of town). Otherwise, regular hose or rain water. Also received 3 inches rain earlier this week and no change. Two fertilizer stakes about 2 feet away from trunk that had nothing but positive affect. Help?
The tree is still trying to establish its root system and it looks stressed. The yellowing may be due to too much moisture, not enough moisture, root competition from the grass, etc.
At this poiint we recommend that you remove the grass all the way out to the dripline of the tree. Mulch with several inches of mulch and keep away from the trunk. Check the sol moisture about once a week. Probe with a screwdriver and if dry, water deeply to make sure the soil is moist about 6 inches down. Do not overwater. Water up until the ground freezes. See more on watering guidelines https://extension.umd.edu/hgic/topics/watering-guidelines
Fertilizer - we do not recommend fertilizer stakes as it concentrates the fertilizer in
one area. If your lawn is being fertilized then the tree will benefit from this.
Fertilize only according to soil test results. The results will give you pH and nutrient deficiencies https://extension.umd.edu/hgic/topics/soil-testing
Wow. Thank you very much! I watered the tree for a good 15 minutes yesterday evening, and by this morning the remaining green leaves had already brightened considerably. I'm hopeful that your suggestions will save it.