- Ageratum spp. – Ageratum
- Castilleja arvensis – Field Indian Paintbrush
- Commelina diffusa – Climbing Dayflower
- Crassocephalum crepidioides – Redflower Ragleaf
- Desmodium intortum – Greenleaf Ticktrefoil
- Emilia fosbergii – Florida Tasselflower
- Emilia sonchifolia – Lilac Tasselflower
- Heterotheca grandiflora – Telegraphweed
- Ipomoea alba – Moonflower
- Ipomoea indica – Oceanblue Morning-glory
- Ipomoea triloba – Littlebell
- Macroptilium lathyroides – Wild Bushbean
- Mimosa pudica var. unijuga – Sensitive Plant
- Momordica charantia – Bitter Melon
- Ricinus communis – Castor Bean
- Solanum americanum – American Black Nightshade
- Sphagneticola trilobata – Wedelia
- Stachytarpheta spp. – Porterweed
- Tropaeolum majus – Nasturtium
Annuals
Annuals are plants with a one-season or one-year life cycle. One-season annuals will quickly sprout, flower, produce seeds, and then die before the next season arrives.
Listed below are some of the annual plants found in Hawaii.