Red

Kniphofia hirsuta 'Traffic Lights'

Hairy Red hot poker

Kniphofia triangularis

Mandarin poker

Lamprocapnos spectabilis 'Valentine'

Chinaman's breeches, Ladies locket, Old-fashioned bleeding heart, Lyre flower

Lathyrus rotundifolius

Persian everlasting pea, Chickling pea

Lavandula stoechas 'Silver Anouk'

French lavender, Butterfly lavender

Lavatera x clementii 'Kew Rose'

Clement's lavatera

Lavatera x clementii Red Rum = 'Rigrum'

Tree lavatera

Leptospermum scoparium 'Burgundy Queen'

Manuka, Broom teatree, New Zealand tea tree

Leptospermum scoparium 'Red Ensign'

Manuka, Broom teatree, New Zealand tea tree

Lewisia 'Little Plum'

Bitterwort, Bitterroot

Lewisia cotyledon 'Sunset Glow'

Bitter root

Leycesteria

Himalayan honeysuckle

Leycesteria formosa 'Purple Rain'

Himalayan honeysuckle, Pheasant berry

Lilium 'Black Beauty'

Lily

Lilium 'Blushing Joy'

Lily

Lilium 'Chartwell'

Oriental lily

Lilium 'Dark Secret'

Asiatic lily

Lilium pardalinum var. giganteum

Red giant, Sunset lily, Leopard lily, Panther lily

Lilium speciosum var. rubrum

Lily

Lobelia cardinalis

Cardinal flower, Indian pink, Red birds, Scarlet lobelia

Lobelia cardinalis 'Bees Flame'

Cardinal flower, Indian pink, Red birds, Scarlet lobelia

Lobelia cardinalis 'Elmfeuer'

Cardinal flower, Indian pink, Red birds, Scarlet lobelia

Lobelia tupa

Devils tobacco

Lobelia x speciosa 'Fan Burgundy'

Hardy bronze leaf lobelia

Lobelia x speciosa 'Fan Tiefrot'

Hardy bronze leaf lobelia

Lobelia x speciosa 'Kompliment Scharlach'

Hardy bronze leaf lobelia

Lobelia x speciosa 'Kompliment Tiefrot'

Hardy bronze leaf lobelia

Lobelia x speciosa 'Sparkling Ruby'

Hardy bronze leaf lobelia

Lonicera 'Celestial'

Honeysuckle hybrid

Lonicera 'Fire Cracker'

Honeysuckle

Lonicera periclymenum 'Fragrant Cloud'

Woodbine, Woodbine honeysuckle

Lonicera periclymenum 'Honeybush'

Woodbine, Woodbine honeysuckle

Lotus berthelotti

Coral gem, Parrot's beak, Pelican's beak, Winged pea

Lupinus 'Beefeater'

West Country lupin

Lupinus 'Camelot Red'

Lupin

Lupinus 'My Castle'

Lupin

Lychnis 'Molten Lava'

Camption, Catchfly

Lychnis chalcedonica

Jerusalem cross, Maltese cross, London pride, Scarlet lightning

Lychnis coronaria

Dusty miller, Rose campion, Mullein pink

Lychnis coronaria Atrosanguinea Group

Dusty miller, Rose campion, Mullein pink

Lychnis coronaria Gardeners World = 'Blych'

Dusty miller, Rose campion, Mullein pink

Lythrum salicaria 'The Beacon'

Purple loosestrife, Spiked loosestrife

Lythrum virgatum 'The Rocket'

Slim leaf loosestrife

Mimulus 'Highland Red'

Monkey flower

Mimulus 'Magic White Flame'

Monkey flower

Mimulus cardinalis

Monkey musk, Crimson Monkey flower

Mirabilis jalapa

Marvel of Peru, False jalap, Four o'clock

Miscanthus sinensis 'Punktchen'

Chinese silver grass, Eulalia grass