What is a sport?
A sport is an abnormal variation in the character of an established variety. Sometimes a shoot will produce a totally different rose in regards to colour and shape. By taking buds from the stem that produced the sport it is possible to grow a new variety or version of rose. It is also possible that a bush rose may send up a long tall cane which produces the same type of flowers on it as the rest of the plant. This can be cultivated to become a climbing sport of that variety.