Serena Williams hits 157 consecutive weeks at No.1 this week, passing Martina Navratilova for the second-longest streak at No.1 in WTA history.
Answers.comÂ® is making the world better one answer at a time. A pecan tree can start producing pecans anywhere from 4 to 10 years if they are grafted. Ungrafted trees can take 10 to 15 years before producing pecans.
Pecan trees generally take 6 to 10 years after planting before they begin to produce good crops of nuts. Only time and patience can correct this issue. Once trees become productive, it's common for them to produce a large crop followed by a small crop -- or no crop -- in alternating years.