Hosta 'Sum Zero'
 

Bob Solberg of Green Hill Farm in North Carolina registered this upright growing sport of H. 'Final Summation' in 2011. The large size plant (24 inches high by 38 inches wide) has dark green foliage that is deeply cupped, nearly round, slightly corrugated and is glaucous on top. Pale lavender, tubular flowers bloom from July into August.

 
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