Answer: There are three types of Clematis: spring bloomers, summer or fall bloomers, and repeat bloomers. Sounds as though you have the spring blooming variety. Spring blooming clematis flower on last year?s growth. Prune them back as soon as they finish blooming in the spring and they will have the whole season to put on new growth and set buds for next year.
There's really no way to encourage summer-long flowering on your spring blooming clematis.
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