Hardenbergia violacea
lilac vine
Helianthemum nummularium
Wisley Pink' sunrose
Helictotrichon sempervirens
blue oat grass
Helictotrichon sempervirens
blue oat grass
Helictotrichon sempervirens
blue oat grass
Helleborus
stinking hellebore
Helleborus x sternii
hellebore
Hesperaloe parviflora
red yucca
Heteromeles arbutifolia
toyon
Heteromeles arbutifolia
toyon
Heterotheca villosa
goldenaster
Heuchera maxima
coral bells
Heuchera micrantha
Palace Purple' coral bells
Heuchera sanguinea
coral bells
Holodiscus discolor
cream bush, ocean spray
Hyssopus officinalis
hyssop
Drought tolerant perennials