University of Maryland Extension

Featured Plants - Clematis ‘Jackmanii’

Author: 
Debbie Ricigliano

Clematis x Jackmanii 

Varieties of clematis come and go, but Jackmanii is a timeless beauty found in gardens since 1862. The lush, velvety deep purple flowers fill the vine from June through August. Jackmanii (pronounced Jack-man-e-i) is a vigorous vine with few pest or disease problems and can eventually reach 12-20 feet.  Support it with a trellis, pergola, fence, or lamppost.  Train it through a shrub or small tree to increase their seasons of interest.  Sit in sun to partial shade, in fertile slightly-alkaline, well-drained soil. Plant them deeply and protect and shade the roots with mulch or a groundcover. This clematis is classified in Group 3 for pruning specifications. Prune and fertilize in late winter or early spring.  Deer do not tend to browse on clematis. 

 

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