H
| A | B | |
| Halogaris 'Wellington's Bronze' | 17 | |
| Hanabusaya asiatica | 10 | |
| Haplopappus brandgei | 7 | |
| Haplopappus lyallii |
6 |
|
|
|
|
|
|
|
8 | |
| Hedysarum alpinum | 8 | |
| Hedysarum hedysaroides | 7 | |
| Hedysarum indulatum | 8 | |
| Hedysarum sulphurescens | 13 | |
| Helianthemum nummularium | 6 | |
| Helianthemun nummularium mutabile | 3 | |
| Helichrysum albobrunneum | 10 | |
| Helichrysum aureum ssp serotinum | 7 | |
| Helichrysum basalticum | 6 | |
| Helionopsis orientalis | 26 | |
| Hesperochiron pumilum | 27 | |
| Heteropappus gouldii | 8 | |
| Heterotheca jonesii | 5 | |
| Heterotheca lyallii | 3 | |
| Heterotecha pumila | 5 | |
| Heterotheca ruthii | 6 | |
| Heuchera americana 'Dale's strain' | 12 | |
| Heuchera 'Emperor's cloak' | 17 | |
| Heuchera 'Firefox' | 15 | |
| Heuchera hallii | 11 | |
| Heuchera 'Palace Purple' | 20 | |
| Heuchera 'Pewter Veil' | 17 | |
| Heuchera pulchella | 19 | |
| Heuchera richardsoni | 11 | |
| Heuchera sanguinea | 13 | |
| Hosta 'Big Daddy' | 28 | |
| Hosta 'August Moon' | 22 | |
| Huechera sanguinea Bressingham | 13 | |
| Heuchera 'Vidar' | 17 | |
| Heuchera villosa var. macrorrhiza | 20 | |
| Hulsea nana | 17 | |
| Hydrangea mix | 18 | |
| Hymenoxys brandgei | 6 | |
| Hymenoxys reideri | 10 | |
| Hymenoxys torreyana | 5 | |
| Hypericum coris | 17 | |
| Hypericum gebleri | 18 | |
| Hypericum olympicum | 9 | |
| Hypericum polyphillum | 15 | |
| Hyssop officinalis aristratus | 5 |