Huachuca Agave
Hummingbird Sage
Huntington Carpet Rosemary
Hybrid Flannel Bush
Hybrid Pink Azalea
Hybrid White Rockrose
Hydrangea
Iceland Poppy
Idaho Locust
Incense Cedar
Indian Currant
Indian Fig Prickly Pear
Indian Summer Gloriosa Daisy
Irene Rosemary
Iris 'Canyon Snow'
Irish Moss
Island Alum Root
Island Bush Poppy
Italian Alder