Houstonia caerulea Houttuynia cordata
Houttuynia cordata 'Chameleon' Hoya carnosa
Hoya carnosa 'Variegata' Humulus lupulus 'Aureus'
Humulus lupulus 'Summer Shandy™' Humulus lupulus 'Variegatus'
Hunnemannia fumariifolia 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 Hypoestes phyllostachya
Hypoestes phyllostachya 'Confetti Red' Hypoxis hirsuta
Hypoxis hygrometrica Hypoxis rooperi
Hyssopus officinalis Iberis x 'Sweetheart'
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 auriculata
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 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'