Masses of yellow bells from end of June to first frost (usually November) with the best display in October. To be honest I am not absolutely sure of the name of my plant (I had thought perhaps it was 'Bill Mackenzie' but those that know; say no!) The flowers are very thick tepaled and scented of orange peel, the main flush of flowers is Sep/Oct although it starts flowering in late June. It never sets viable seed (but that may be the climate in here in Cornwall!) A rampant grower Clematis 'Last Dance' can be cut back hard in the winter. Best planted in sun or semi-shade.