Plant Profile: Clematis x jackmanii

Clematis x Jackmanii is a hybrid resulting from the crossbreeding of Clematis languinosa and Clematis viticella. This variety was introduced by the English nurseryman George Jackman between 1858 and 1862, after whom it is named.

This vigorous climber produces striking purple-violet flowers that bloom throughout the summer and continue to sporadically reflower until the first frost. It can ascend various structures, including walls, trees, shrubs, evergreens, trellises, and even mailboxes, or it can be allowed to spread out as a ground cover when left unsupported. In the fall, the flowers give way to unique small, dry seed heads adorned with silky, plume-like tails that evoke the appearance of a sea anemone.

For optimal growth, clematis thrives when its flowers receive sunlight while its roots remain shaded. It is advisable to protect the roots with mulch or by planting other perennials nearby. Pruning should be done in late winter or early spring, prior to the emergence of new growth.