> Mules are a cross bread of donkey and horse and are effectively sterile, ergo no tree. Not always.[1] [1] https://horses.extension.org/is-there-a-chance-tha

> Mules are a cross bread of donkey and horse and are effectively sterile, ergo no tree. Not always.[1] [1] https://horses.extension.org/is-there-a-chance-that-a-mule-may-reproduce-if-bred/ https://horses.extension.org/is-there-a-chance-that-a-mule-m...