Question
We live on the Oregon Coast, close to the Ca. state ine, we have Myers Lemon trees, they are about 15 years old, they have produce lemons a lot of lemons, this year, the lemons are rotting on the inside of the lemon, they look dried inside, do you have any idea what is wrong, we feed it, and do all that stuff. would a freeze cause this or what do you think we can do? thanks for any help at all. ps, my husband, just told me, that one lemon tree is getting the rotten lemons, the other one isn't, they are close to each other.

Answer
Hi Phil, Symptoms: Fruit infected with Altrnaria may turn light in color several weeks before the color break in healthy fruits. Some infected fruit may prematurely drop while others may remain on the tree.

Infected fruit may appear normal. The simple method of diagnosis is to cut the fruit in half, exposing the stylar or "blossom" end and the central cavity. Diseased fruit have a brown to blackish discoloration at the "blossom" end. The discoloration and decay may be restricted to the "blossom" end or it may extend deep into the central cavity. Observations of infected tissue in the laboratory reveals the presence of Alternaria. Fungal spores are unique in appearance. There may be little or no external evidence of infection. In lemons the disease is most common during storage. In Arizona, splitting, caused by environmental factors, often predispose navel oranges to infection by Alternaria. Large navel fruit may split and drop in the fall during hot, dry weather. The incidence of splitting is higher in sunburned fruit, and in trees stressed by drought and frost injury.

A freeze could also harm one tree and not the other depending on location to the cold wind.  Also another possibility is not enough water which will cause the fruit to be dry inside.  

If it is caused by the above you could spry with Atomic Grow to get your tree back to health, it is organic.  And you could use it on all other plants for health also.  kathy