Hopseed Bush, 'a'ali'i
Horsetail Rush
Horsetail Tree
Howard McMinn Manzanita
Hummingbird or Pitcher Sage
Huntington Carpet Rosemary
Hybrid Forsythia
Hybrid Mimulus selections
Hybrid Tea Rose cultivar
Hybrid White Rockrose
Iceland Poppy
Idaho Locust
Improved Freesia
Improved Meyer Lemon
Incense Cedar
Indian Currant, Coralberry
Indian Laurel Fig, Chinese Banyan
Indian Mock Strawberry
Indian Princess Rhaph
Indian Summer Gloriosa Daisy