Japanese snowbell care question - Knowledgebase Question

Portland, OR
Avatar for frankie0
Question by frankie0
August 7, 2006
I have one of your Jap. Snowbell trees that I purchased in 2002. It is growing quite well and is doing just fine. But last year at about this time, the leaves started turning yellow in the veins which looked to me like iron deficiency. Put in lots of iron but the leaves never went green for the rest of the season.
This year, the tree is growing vigorously but I'm noticing that some of the leaves are starting to yellow.
I water regularly. The tree is in a raised bed with several feet of very good soil. I fertilize in the Spring and Fall with a GP fertilizer. It gets full sun from the South most of the day and seems to be mostly happy.
I really like my tree and would like to know what's causing the leaves to yellow. Your advice would be greatly appreciated!

Answer from NGA
August 7, 2006
Iron deficiency shows up as chlorotic leaves - those with bright green veins and yellow or white tissues. If the veins are yellowing and then the entire leaf turns yellow, it indicates a need for nitrogen. I suspect your soil is acidic (based upon the amount of annual rainfall) so you might want to have the soil tested. If the pH is quite low, nitrogen will be bound up in the soil and unavailable to your tree. Once you have the results of your soil test you can adjust the soil's pH so it is between 5.8 and 6.4 which will suit your tree just fine.

Best wishes with your landscape!

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