Hybrid tomatoes are deliberately crossed varieties. Seeds from one plant with desired traits are crossed with another to ...

Callery pear trees, though once popular, are now illegal to plant, grow or sell in Ohio due to their invasive nature. The trees spread easily as birds eat their fruit and disperse the seeds widely.

He said what changed was that in the 1970s, different varieties of Callery pear trees were introduced in the U.S. They cross-pollinated and created hybrids that easily took root where suitable ...