I live in Florida and I have a tree with the same problem. After
endless searching and contacting those in the know, I discovered that
the primary reason is that the root or base plant which is the lower
of the graft section is always sour. The upper graft, the flowering
section, the sweet type of orange we hope to continue in growth.
However in some cases the lower primary plant becomes dominant over
the entire tree and the oranges become sour. And that's the
truth.......Not much one can do.





mike wrote in message news:OTOha.15474$OV.113955@rwcrnsc54...
Dance around it on full moons and at the solstices. Getting sweet
oranges is a function of mystery. It's all about climate, and of course
variety.


George Shirley wrote:
Make marmalade out of them, that's the only suggestion I have. I don't
think you can make a sour orange edible.

George

Glenn Letsch wrote:

We live in Walnut Creek California
We planted an (Dwarf?) orange tree several years ago.
It is bearing an immense amount of fruit
but the oranges are VERY VERY sour, even if you leave them on the tree
til they are deep orange. It doens't matter how long they stay on the
tree
They are not edible.

Is there anything we can do to make them edible?
Even for next season?

Thanks
Glenn L