Houstonia caerulea Houttuynia cordata
Houttuynia cordata 'Chameleon' Hoya carnosa
Hoya carnosa 'Variegata' Humulus lupulus 'Aureus'
Humulus lupulus 'Summer Shandy™' Humulus lupulus 'Variegatus'
Hunnemannia fumariifolia Hunnemannia fumariifolia 'Sunlite'
Hyacinthoides hispanica Hyacinthoides hispanica 'White City'
Hyacinthus orientalis Hyacinthus orientalis 'Atlantic'
Hyacinthus orientalis 'Jan Bos' Hydrocleys nymphoides
Hydrocotyle sibthorpioides 'Crystal Confetti' Hydrocotyle umbellata
Hydrocotyle verticillata Hylocereus polyrhizus
Hylocereus undatus Hylotelephium 'Bertram Anderson'
Hylotelephium 'Carl' Hylotelephium 'Garbro (Garnet Brocade™)'
Hylotelephium 'Gold Dust' Hylotelephium 'Little Moor'
Hylotelephium 'Matrona' Hylotelephium 'Mohrchen'
Hylotelephium 'Rosy Glow' Hylotelephium 'Strawberries & Cream'
Hylotelephium 'SunSparkler® Firecracker' Hylotelephium 'Thundercloud'
Hylotelephium (z)(Herbstfreude Group) 'Autumn Joy' Hylotelephium anacampseros
Hylotelephium caucasicum 'Atropurpureum' Hylotelephium cauticolum
Hylotelephium cauticolum 'Lidakense' Hylotelephium cyaneum 'Rosenteppich'
Hylotelephium erythrostictum 'Frosty Morn' Hylotelephium erythrostictum 'Mediovariegatum'
Hylotelephium ewersii Hylotelephium sieboldii
Hylotelephium sieboldii 'Nana' Hylotelephium spectabile
Hylotelephium spectabile 'Autumn Fire' Hylotelephium spectabile 'Brilliant'
Hylotelephium spectabile 'Neon' Hylotelephium telephium 'Atropurpureum'
Hylotelephium telephium 'Vera Jameson' Hymenocallis caribaea
Hymenocallis hybrid Hymenocallis latifolia
Hypericum 'Gemo' Hypericum densiflorum
Hypericum x moserianum 'Tricolor' Hypoestes phyllostachya
Hypoestes phyllostachya 'Confetti Red' Hypoxis hirsuta
Hypoxis hygrometrica Hypoxis rooperi
Hyssopus officinalis Iberis x 'Sweetheart'
Iberis amara Iberis carnosa
Iberis sempervirens Iberis sempervirens 'Alexander's White'
Iberis sempervirens 'Autumn Beauty' Iberis sempervirens 'Dick Self'
Iberis sempervirens 'Little Gem' Iberis sempervirens 'Majestic'
Iberis sempervirens 'Purity' Iberis sempervirens 'Snowflake'
Impatiens x 'Bright Eye' Impatiens x 'Seashells'
Impatiens 'Blondie' Impatiens 'Camellia Blackberry Trifle'
Impatiens 'Jungle Gold' Impatiens 'Orange Pinwheel Gem'
Impatiens auricoma Impatiens auricoma 'Blondie'
Impatiens auriculata Impatiens balfourii
Impatiens balsamina Impatiens balsamina 'Blackberry Trifle'
Impatiens balsamina 'Fusion™' Impatiens flaccida
Impatiens x hawkeri Impatiens x hawkeri 'Celebrette Light Coral'
Impatiens x hawkeri 'Colorpower Purple Flame' Impatiens x hawkeri 'New Guinea'
Impatiens x hawkeri 'Pure Beauty Fuchsia' Impatiens kilamanjarensis
Impatiens namchabarwensis Impatiens oneiana
Impatiens repens Impatiens tinctoria
Impatiens walleriana Impatiens walleriana 'BALFIEPURP (Rockapulco® Purple)'
Impatiens walleriana 'Balpapina (Patchwork Pink Shades)' Impatiens walleriana 'Blackberry Ice'
Impatiens walleriana 'Blitz 2000 Red' Impatiens walleriana 'Candy® Coral Bee'
Impatiens walleriana 'Candy® Deep Salmon' Impatiens walleriana 'Candy® Mix'
Impatiens walleriana 'Candy® Rose Star' Impatiens walleriana 'Center Stage'
Impatiens walleriana 'Fiesta™ Lavender Orchid' Impatiens walleriana 'Firefly'
Impatiens walleriana 'Lavender Orchid (Rockapulco® Orchid)' Impatiens walleriana 'Patchwork Cosmic Burgundy'
Impatiens walleriana 'Patchwork Cosmic Orange' Impatiens walleriana 'Rose Parade'
Impatiens walleriana 'Rosette' Impatiens walleriana 'Show Stopper'
Impatiens walleriana 'Stardust Salmon' Impatiens walleriana 'Super Elfin Orange'
Impatiens walleriana 'Super Elfin Swirl' Impatiens walleriana 'Victorian Rose'