| Haberlea rhodopensis |
| Hamamelis intermedia "Diane" |
| Hamamelis mollis |
| Haplopappus glutinosus |
| Haplopappus reideri |
| Helenium "Flammendes Kätchen" |
| Helenium "Zimbelstern" |
| Helenium "Moerheim Beauty" |
| Helenium "Rubinzwerg" |
| Helianthemum "Lawrenson's Pink" |
| Helianthemum "Amabile Plenum" |
| Helianthemum "Ben More" |
| Helianthemum "Bronzeteppich" |
| Helianthemum "Cornish Green" |
| Helianthemum "Elfenbeinglanz" |
| Helianthemum "Golden Queen" |
| Helianthemum "Henfield Briljant" |
| Helianthemum "Ravens Oranje" |
| Helianthemum oelandicum alpestre |
| Helianthus "Lemon Queen" |
| Helianthus "Capenoch Star" |
| Helichrysum "Schwefellicht" |
| Helichrysum italicum |
| Heliopsis "Asahi" |
| Heliopsis "Summer Sun" |
| Helleborus "Donkere Nectarien" |
| Helleborus anemoonbloemig picotee |
| Helleborus atrorubens |
| Helleborus dubbel crèmegeel |
| Helleborus hybr.Leiblauw |
| Helleborus hybr.Purperzwart |
| Helleborus niger |
| Helleborus orientalis |
| Helleborus x nigricors |
| Hemerocallis "Arctic Snow" |
| Hemerocallis "Campfire Embers" |
| Hemerocallis "Crawley Crown" |
| Hemerocallis "Double Firecracker" |
| Hemerocallis "Frances Fay" |
| Hemerocallis "Gold Dust" |
| Hemerocallis "Joan Senior" |
| Hemerocallis "Lullabay Baby" |
| Hemerocallis "Mayah Perfume" |
| Hemerocallis "Pandora's Box" |
| Hemerocallis "Pardon Me" |
| Hemerocallis "Pink Damask" |
| Hemerocallis "Princess Blue Eyes" |
| Hemerocallis "Rocket City" |
| Hemerocallis "Stella de Oro" |
| Hemerocallis "Summer Wine" |
| Hemerocallis "Tropical Tangarina" |
| Hepatica nobilis |
| Heuchera "Beauty Color" |
| Heuchera "Amber Waves" |
| Heuchera "Chocolate Ruffles" |
| Heuchera "Frosted Violets" |
| Heuchera "Petit Pearl Fairy" |
| Heuchera "Petite Marble Burgundy" |
| Heuchera "Plum Pudding" |
| Heuchera "Purple Ace" |
| Heuchera "Rachel" |
| Heuchera "Silver Indiana" |
| Heuchera micrantha "Palace Purple" |
| Heuchera sanguinea "Leuchtkäfer" |
| Heucherella "Quicksilver" |
| Heucherella alba "Rosalie" |
| Hibiscus moscheutos "Southern Belle" |
| Hibiscus syriacus "Leopoldii" |
| Hibiscus syriacus "Oiseau Blue" |
| Hibiscus syriacus "Speciosus" |
| Hieracium pilosella "Kupferteppich" |
| Hieracium rubrum |
| Hippurus vulgaris |
| Horminum pyrenaicum |
| Hosta "Blue Cadet" |
| Hosta "Gold Edger"? |
| Hosta "Honeybells" |
| Hosta "Pearl Lake" |
| Hosta "So Sweet" |
| Hosta Kirisbima |
| Hosta minor |
| Hosta plantagineae grandiflora |
| Hosta sieboldii |
| Hosta tardiana "Hadspen Blue" |
| Hosta venusta minor |
| Hutchinsia alpina |
| Hydrangea macr. "Ayesha" |
| Hydrangea macr. "Hanabi" |
| Hydrangea macr. "Holstein" |
| Hydrangea macr. "Love you Kiss" |
| Hydrangea macr. "Merveille Sanguine" |
| Hydrangea pan. "Grandiflora" |
| Hydrangea petiolaris |
| Hymenoxys scaposa |
| Hypericum aegypticum |
| Hypericum dumm. "Peter Dummer" |
| Hypericum olympicum "Citrinum" |
| Hyssopus officinalis |