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• Herbs

• Houseplants

• Hazelnut, Filbert (Corylus)

• Heather, Heath (Calluna, Erica)

• Hemlock (Tsuga)

• Hawthorn (Crataegus)

• Hibiscus (Hibiscus)

• Hickory

• Holly (Ilex)

• Hollyhock (Alcea)

• Honeylocust (Gleditsia)

• Honeysuckle (Lonicera)

• Horsechestnut, Buckeye (Aesculus)

• Horseradish (Armoracia)

• Hosta (Hosta)