Some Nectar Plants you may wish to include in your garden:

Ageratum – For Monarchs, Queens and Blues
Blue Porterweed (Stachytarpheta spp.)– A favorite of many.
Butterfly Bush (Buddelia davidii) – For all butterflies including the larger Swallowtails and Fritillaries
Cosmos  – Monarchs
Citrus – Swallowtails
Dune Sunflower (Helianthus debilis) – A good ground cover and nectar plant.
Firebush (Hamelia patens) – Zebras and Sulphurs adore it!
Geiger (Cordia spp.) – Smaller butterflies and hummingbirds love it.
Golden Dewdrop (Duranta erecti) – A food source for birds too.
Heliotrope – A very fragrant attractor.
Hibiscus – For hummingbirds and butterflies
Lantana – Another all around butterfly favorite
Liatris – Spikes of dark purple attract many species
Mexican Flame (Senecio confusus)- Put it on a wall or trellis
Peregrina also called Jatropha (Jatropha hastata) – A small tree with red blossoms and lots of butterflies
Pentas – Especially the red, magenta and white
Pink Porterweed – Zebras and Sulphurs
Scarlet Milkweed – Monarchs and Queens
Scarlet Sage (Salvia coccinea)– Butterflies and hummingbirds
Wild Coffee (Psychotria undata) – Zebras
Zinnia – Black Swallowtails

And the bedding plants: aster, bachelor button, daisy, impatiens, marigold, petunia and verbena.