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Anna, Biologist, Gardening Expert
Category: Landscaping
Satisfied Customers: 11548
Experience:  I am a biologist with experience in water gardening, and growing trees, ornamental plants, and vegetables.
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We have 6 ornamental Pear trees..25 ft tall all within 20

Customer Question

We have 6 ornamental Pear trees..25 ft tall all within 20 feet of each of the them the leaves are turning greenish yellow....did the same thing last summer. Is it anything to be concerned about?
Submitted: 1 year ago.
Category: Landscaping
Expert:  Anna replied 1 year ago.

Hello and welcome. My name is ***** ***** I'm a biologist with a special interest in arboriculture. Some additional information will help me figure out what is going on with your tree.

Are the leaves uniformly greenish yellow, or is only part of each leaf changing?

If only part, is it the veins, the edges, or streaks all over the leaves?

Thank you.


Customer: replied 1 year ago.

uniform yellow to light veins or streaks or spots

Expert:  Anna replied 1 year ago.
Thank you for getting back to me. I'm working on some information for you now, and will post it as soon as I have it typed up. I'll be back shortly.
Expert:  Anna replied 1 year ago.
Thank you for waiting. Uniformly yellowing leaves can be caused by several things, but it's very strange that only one of your trees is affected. Either too much or too little water can do this, but surely the other trees would be affected, too.Certain nutrient deficiencies can also cause yellowing. However, this type is often not solid yellowing, but rather, streaks or yellow veins, or only the veins remain green. It varies depends not on what nutrient is lacking. This would have been the easiest problem to treat, but since the leaves have to inform yellowing, it isn't likely.Finally, damage to the roots or trunk can cause yellowing leaves. This seems most likely in your situation. Trunk damage can be caused by lawn mowers, weed whips, rabbits, or lightning. Root damage can be the result of digging near the roots, piling mulch too deeply over them, being too near road salt, lawn chemicals applied too close or leaching in, or fungal infections. Once this type of damage occurs, there isn't a lot you can do. Give the tree the best care possible. Water during dry spells, fertilize with a flowering shrub and tree fertilizer, and mulch only lightly and not up against the trunk. You can treat the tree with a fungicide drench, such as AgriFos. The fertilizers and fungicides are sold in nurseries and garden centers. Unless there is a fungal root infection, the fungicide won't do any good, but it can't hurt to try.I believe you deserve honesty, and I think it most likely that the tree will continue to do this each year, gradually weakening it. Good care can slow the process. In some cases, such care can help the tree gain enough strength to overcome whatever is the problem. I hope that will be the case with your tree.Anna
Expert:  Anna replied 1 year ago.

Hello again,

Do you have any additional questions. Just let me know if you do.


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