Diamantina Clematis not blooming

Toronto, zone 6, mature diamantina clematis , 5 years old, mature with lots of green leaves, about 7 ft. tall , sunny area all day, not blooming since 2019, should bloom mid July. Need help with pruning and fertilizing info.…

clematis and hydrangea

Hi I have clematis stem reached like 12 feet. This year, so far, it look dead. The other stems changed to green or maybe new one took over so I can not tell. My question, should I cut the stem…