Question
I live in Rancho Cucaminga which is in the Inland Empire of So Calif.  I have a mature lemon tree, variety unknown, possibly Meyer. When sliced open, the fruit is greenish-yellow. The tree was mature when I purchased my house 5 years ago.
For the past 4 years, all fruit has what appears to be blossom end rot. When the fruit on the tree is immature green, it looks great. The minute it matures and turns yellow, the ends rot (the end that is not attached to the branch). The tree is otherwise healthy, leaves are great, plentiful blossoms, the tree itself is actually thriving and very productive. Can't attach an image because I have no mature fruit at this time.
Any ideas what may be causing this and, if so, can anything be done?
Many thanks
Many thanks

Answer
Hi Roslyn, Blossom end rot is a fungus.  You can treat your tree with a fungicide like copper which you have to be careful with a you can then create a copper problem in the soil.  Or, you can check out Atomic Grow, which is organic and will make the citrus healthy to end the problem naturally.  kathy