Purple

Matthiola 'Cinderella Lavender'

Brompton stock

Matthiola incana

Brompton stock, Ten week stock, Gillyflower, Hoary stock

Melica altissima 'Atropurpurea'

Purple melic grass, Purple Siberian melic

Mentha

Mint

Mentha aquatica

Water mint, Orange mint

Mentha longifolia

Horse mint, Long leaved mint, Biblical mint

Mentha longifolia subsp. capensis

South African horse mint

Mentha pulegium

Pennyroyal, Pudding grass

Mentha x gracilis

Ginger mint, Red mint, Bushy mint

Molinia caerulea

Purple moor grass, Mountain's friend

Molinia caerulea 'Banshee'

Purple moor grass

Molinia caerulea 'Karl Foerster'

Purple moor grass, Mountain's friend, Tall purple moor grass

Molinia caerulea 'Poul Petersen'

Purple moor grass

Molinia caerulea 'Transparent'

Purple moor grass, Mountain's friend, Tall purple moor grass

Molinia caerulea subsp. arundinacea 'Bergfreund'

Purple moor grass, Mountain's friend, Tall purple moor grass

Monarda 'Mohawk'

Bergamot, Bee balm, Oswego tea

Monarda 'Prarienacht'

Bergamot, Bee balm, Oswego tea

Monarda 'Scorpion'

Bergamot, Bee balm, Oswego tea

Monarda 'Vintage Wine'

Bergamot, Bee balm, Oswego tea

Monarda 'Violet Queen'

Bergamot, Bee balm, Oswego tea

Monarda Balmy Purple = 'Balbalmurp'

Bee balm

Monarda citriodora

Wild bergamot, Horsemint

Monarda fistulosa

Wild bergamot, Wild bee balm

Nemesia 'Blueberry Ice'

Cape snapdragon

Nemesia 'Evening Dusk'

Cape snapdragon

Nemesia 'Melody Morello Ice'

Cape snapdragon

Nemesia 'Sunsatia Plus® Little Berry'

Cape snapdragon

Nemesia Fairy Kisses Vanilla Berry = 'INNEMVANBE'

Cape snapdragon

Nemesia Fairy Kisses™ 'Cassis'

Cape snapdragon

Nepeta racemosa

Persian catmint

Nepeta tuberosa

Tuberous catmint

Nepeta x faassenii

Blue catmint, Faassen's nepeta, Mauve catmint

Ocimum basilicum 'Cinnamon'

Common basil, Sweet basil

Olearia 'Henry Travers'

Daisy bush, New Zealand daisy bush, Tree aster

Olsynium douglasii

Grass widow, Purple eyed grass

Onopordum acanthium

Thistle, Giant thistle, Scotch thistle, Cotton thistle, Woolly thistle, Down thistle

Ophiopogon planiscapus Nakai Black Beard = 'Yapard'

Japanese mondo grass

Origanum dictamnus 'French Flair'

Oregano

Origanum laevigatum 'Herrenhausen'

Marjoram, Marjory, Showy oregano, Smooth leaved oregano

Origanum rotundifolium

Round leaved oregano, Round leaved marjoram

Osteospermum 'SummerSmile® Magenta'

African daisy

Osteospermum 'SummerSmile® Soft Violet'

African daisy

Paederota bonarota

Blue paederota

Paeonia x suffruticosa 'Purple'

Chinese tree peony

Panicum virgatum 'Oxblood Autumn'

Switch grass

Panicum virgatum Hot Rod = 'Ecgphr19'

Switch grass

Parahebe perfoliata

Digger's speedwell

Passiflora 'Damsel's Delight'

Passion flower