Purple

Pennisetum 'African Breeze'

Fountain grass

Pennisetum alopecuroides 'Moudry'

Fountain grass, Swamp foxtail grass, Chinese pennisetum, Chikara shiba

Penstemon 'Alice Hindley'

Beard tongue

Penstemon 'Charles Rudd'

Beard tongue

Penstemon 'Countess of Dalkeith'

Beard tongue

Penstemon 'Ice Cream™ Blackberry'

Beard tongue

Penstemon 'Lilac Frost'

Beard tongue

Penstemon 'Maurice Gibbs'

Beard tongue

Penstemon 'Midnight'

Beard tongue

Penstemon 'Pensham Blackberry Ice'

Beard tongue

Penstemon 'Pensham Czar'

Beard tongue

Penstemon 'Pensham Westminster Belle'

Beard tongue

Penstemon 'Purple Perfection'

Beard tongue

Penstemon 'Raven'

Beard tongue

Penstemon 'Sour Grapes' M. Fish

Beard tongue

Penstemon fruticosus var. scouleri 'Amethyst'

Scouler's woody beard tongue

Penstemon Phoenix Violet 09 = 'Peni Vio09'

Beard tongue

Penstemon smallii

Small's beard tongue

Penstemon Vesuvius = 'Yasius'

Beard tongue

Perovskia atriplicifolia 'Bluesette'

Azure sage

Petunia 'Surfinia® Trailing Big Purple'

Petunia 'Viva Double Purple Vein'

Trailing petunia

Petunia Bordeaux = 'LANBOR'

Trailing petunia

Petunia hybrida 'AMAZONAS™ Midnight Finch'

Petunia Painted Love Purple = 'PEHY0084'

Trailing petunia

Philadelphus 'Dainty Lady'

Mock orange

Phlomis italica

Balearic Island phlomis

Phlomis tuberosa 'Amazone'

Tuberous phlomis, Jerusalem sage, Sage-leaf mullein

Phlox 'Paparazzi Angelina'

Phlox glaberrima 'Bill Baker'

Thick-leaf phlox, Carolina phlox

Phlox maculata 'Alpha'

Meadow phlox, Wild sweet William, Spotted phlox, Early phlox

Phlox paniculata 'Amethyst'

Border phlox, Perennial phlox, Summer phlox, Autumn phlox, Fall phlox

Phlox paniculata 'Border Gem'

Border phlox, Perennial phlox, Summer phlox, Autumn phlox, Fall phlox

Phlox paniculata 'Branklyn'

Border phlox, Summer phlox

Phlox paniculata 'Caroline van den Berg'

Border phlox, Perennial phlox, Summer phlox, Autumn phlox, Fall phlox

Phlox paniculata 'David's Lavender'

Border phlox, Summer phlox

Phlox paniculata 'Eclaireur' Lemoine

Border phlox, Summer phlox

Phlox paniculata 'Grey Lady'

Border phlox, Summer phlox

Phlox paniculata 'Lilac Time'

Border phlox, Perennial phlox, Summer phlox, Autumn phlox, Fall phlox

Phlox paniculata 'Little Laura'

Border phlox, Summer phlox

Phlox paniculata 'Peacock Lavender Bicolour'

Border phlox, Summer phlox

Phlox paniculata 'Peacock Lilac'

Border phlox, Summer phlox

Phlox paniculata 'Peacock Purple Bicolor'

Border phlox, Summer phlox

Phlox paniculata 'Prospero'

Border phlox, Perennial phlox, Summer phlox, Autumn phlox, Fall phlox

Phlox paniculata 'Purple Kiss'

Border phlox, Summer phlox

Phlox paniculata 'The King'

Border phlox, Summer phlox

Phlox Purple Flame = 'Barfourteen'

Phlox Violet Flame = 'Barsixtyone'