'General Sikorski' Clematis is a vigorous climbing vine with large lavender blue flowers set off by soft yellow stamens. Clematis 'General Sikorski' starts blooming in late spring and continues throughout June. Like a number of other Clematis, 'General Sikorski' will often rebloom in late summer and early fall. This vigorous vine needs something to cling to, so plant it with a trellis or beside a shrub which it can grow up through. Prune after 1st flowering.