Kokiʻo ʻula'ula   Hibiscus kokio spp. kokio

Koki'o 'ula'ula is a beautiful red-flowered shrub that blooms almost year round. We grow this Hibiscus from cuttings so genetic heritage from the wild plant is present. This endangered Hibiscus can reach heights of 20+ ft but most often exhibits a spreading shrub form.  Plant 6-8 feet apart for a hedge.

see moisture zone map here
more info on kokiʻo 'ula   Hibiscus clayi