• (1) H - Haha
• (2) Haha - Hairy Maidenhair Fern
• (3) Hairy Maidenhair Fern - Haleakala Silversword
• (4) Haleakala Silversword - Handlappiger Rhabarber
• (5) Handmaiden Daffodil - Hardy Geranium
• (6) Hardy Geranium - Hardy Water Lily
• (7) Hardy Water Lily - Harpswell Prelude Siberian Iris
• (8) Harpswell Snowburst Siberian Iris - Havard's Agave
• (9) Havard's Bluebonnet - Haworthia
• (10) Haworthia - Head
• (11) Head - Heath Daisy-Bush
• (12) Heath Dog Violet - Hegyi Len
• (13) Hegyi Margaréta - Hemlock Daylily
• (14) Hemlock Dwarf Mistletoe - Herba De La Taca (Catalan)
• (15) Herba De Les Vinyes - Hexe Prima Rhododendron
• (16) Hexe Rhododendron - Highbelia
• (17) Highbelia - Himalayan Hazelnut
• (18) Himalayan Honeysuckle - Hispid Greenstripe
• (19) Hispid Mock Vervain - Hoja Menuda
• (20) Hoja Menuda - Hom Dang
• (21) Hom Farang - Hong Hua Ba Jiao
• (22) Hong Hua Can Dou - Hopperupsklaver
• (23) Hoppner's Sedge - Horseshoe Geranium
• (24) Horseshoe Geranium - Hosta
• (25) Hosta - Hosta
• (26) Hosta - Hot Pepper
• (27) Hot Pepper - Hot Pepper
• (28) Hot Pepper - Hot Pepper
• (29) Hot Pepper - Howard Poole Southern Magnolia
• (30) Howard Smith Daylily - Huang Tian Zhu
• (31) Huang Xi Xin - Hundslauch
• (32) Hundsmelde - Hybrid Deadnettle
• (33) Hybrid Deciduous Azalea - Hybrid Epiphyllum
• (34) Hybrid Epiphyllum - Hybrid Epiphyllum
• (35) Hybrid Epiphyllum - Hybrid Tea
• (36) Hybrid Tea - Hybrid Tea Rose
• (37) Hybrid Tea Rose - H™gel Klee