Leucanthemum superbum 'Thomas Killen' a/k/a Shasta Daisy, Family: Asteraceae/Compositae (aster/daisy Family) Zones 5 to 9; Full Sun. Mature size: 24 to 30 inch high, spreads 18 to 24 inches;bushy mounded clump. Technically a single flower, 'Thomas Killen' has double rows of petals an... See More