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.
Care of Young Trees. Watering â To successfully grow pecan trees, it is important to adequately water them (10 to 15 gallons at regular weekly intervals, either by rainfall or irrigation) for the first two to three years.