6-8″ tall x 6-10″ wide. An ever-blooming, perennial Johnny Jump-up type Viola, Viola hybrida ‘Balvijac’ (Jumping Jack Perennial Viola) is the latest in breeding from Europe. Both heat and cold hardy, the cheerful purple-and yellow-faced flowers keep coming all growing season. Jumping Jack is great for the front of the perennial border and in containers.