The old lime tree was no doubt Nursery stock. Her fruit when ripened turns yellow but her insides are lime green. It sits on what used to be a citrus farm, mostly lemons. The power utility bought the farm and placed high voltage pylons' on it. Then they leased it to the city for the local gardeners. It can get below freezing on occasion here, never in the 20's though, morning comes and we are right back up to the 60's by 10am. It gets plenty of full sun and water. She produces hundreds of pounds each year. So many they will rot on the ground. I gather the good ones, squeeze the juice out of them and freeze it. Good stuff.