My peach trees have yellowing leaves. I'm in SE New Mexico. It seems not normal. What might it be?

From what I have read, a few yellowing leaves is normal, especially with the hot summer we are going through this year.





From:


http://en.wikipedia.org/wiki/Peach





"Watering


For optimum growth, peach trees require a constant supply of water. This should be increased shortly before the harvest. The best tasting fruit is produced when the peach is watered throughout the season. Drip irrigation is ideal, at least one dripper per tree. Although it is better to use multiple drippers around the tree, this is not necessary. A quarter of the root being watered is sufficient.





Fertilizing


Peaches have a high nutrient requirement, needing more nitrogen than most other fruit trees. An NPK fertilizer can be applied regularly, and an additional mulch of poultry manure in autumn soon after the harvest will benefit the tree. If the leaves of the peach are yellow or small, the tree needs more nitrogen. Blood meal and bone meal, 3–5 kg per mature tree, or calcium ammonium nitrate, 0.5–1 kg, are suitable fertilizers. This also applies if the tree is putting forth little growth.





Tips for good fruit


If the full amount of peaches is left, they will be under-sized and lacking in sugar and flavour. In dry conditions, extra watering is important. The fruit should be thinned when they have reached 2 cm in diameter, usually about 2 months after flowering. Fresh fruit are best consumed on the day of picking, and do not keep well. They are best eaten when the fruit is slightly soft, having aroma, and heated by the sun."

My peach trees have yellowing leaves. I'm in SE New Mexico. It seems not normal. What might it be?
You're dealing with a really hot summer in that part of the country; when this occurs, peach trees often drop leaves for the same reason that they drop them in the fall - to cut down on the need for water. As long as it's not a huge percentage of the leaves on the tree, it's probably best to simply allow it to happen. It's not THAT far from fall, and presumably your crop has already made. Just follow your normal routine to prepare for next year's crop.
Reply:Yellowing can be a sign of nutrient deficiancies too (usually iron or nitrogen) If you have a good garden center around, bring them some leaves, they should be able to tell whether it is a deficiancy or just from the heat.
Reply:could be lack of water or some of the leaves are old and turn color and fall off and new ones growl
Reply:They need ashes to get green, but a good goat, rabit excrement would help them also very good.



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