Zantedeschia 'Snow Storm' has pure white trumpet-shaped flowers with green bases and bright green leaves with white spots.

Zantedeschia 'Summer Fun' has bright yellow trumpet-shaped flowers with green bases and bright green leaves with white spots.

Zauschneria arizonica is smothered in hummingbird-adored, tubular, orange-scarlet flowers from late summer into fall.

Zauschneria 'Orange Carpet' produces masses of tubular orange-scarlet flowers loved by hummingbirds.

Zinnia grandiflora 'Gold on Blue' is hardy to zone 4 with fine, textured, bluish-green foliage topped with golden yellow flowers all summer.