Incrediball' produces flowers that open green, then mature to white before fading to green again. Will reach 4-5' tall and wide.
Sister Theresa' produces massive, true-white blooms. It will grow to be 4-5' tall and wide at maturity.
Spikey, blue green foliage stays mounded, keeping a dense growth habit. Creamy-white flowers spikes appear in summer. Grows 4-5' tall and 2-3' wide.