This year’s crop of oranges tasted good. All citrus trees are grafted onto hardy rootstock. The rootstock provides resistance to some soil-borne diseases and limits the tree’s mature height.

The problem is the rootstock of your navel orange tree has been allowed to sprout and grow. It is growth from the rootstock of your tree that has grown tall and is producing the poor-quality fruit.

The seedless navel orange was the result of a mutation which occurred in a tree ... This requirement ensures that all new citrus plants are disease-free. Incoming trees are tested for more than 30 ...

Our young navel orange tree has a tall sprout coming up the middle. ... The rootstock provides resistance to some soil-borne diseases and limits the tree’s mature height.

Q. Our young navel orange tree has a tall sprout coming up the middle. This is the first year the sprout has grown leaves; before it was just thorns. Should this sprout be cut off? This year’s ...

Q. Our young navel orange tree has a tall sprout coming up the middle. This is the first year the sprout has grown leaves; before it was just thorns. Should this sprout be cut off? This year’s crop of ...