Nepeta racemosa 'Grog'

Nepeta nervosa 'Pink Cat'

Nepeta 'Walker's Low'

Oenothera fruticosa

Oenothera tetragona

Onoclea sensibilis

Origanum laevigatum 'Herrenhausen'

Origanum 'Rosenkuppel'

Origanum vulgare

Origanum vulgare 'Compactum'

Papaver nudicaule 'Champagne Bubbles Scarlet'

Papaver orientale 'Allegro'

Papaver nudicaule 'Pop-up Yellow'

Penstemon 'Apple Blossom'

Pennisetum alopecuroides 'Little Bunny'

Penstemon 'Garnet'

Penstemon hartwegii 'Polaris Magenta'

Penstemon 'Raven'

Penstemon 'Polaris Pink'

Penstemon 'White Bedder'

Penstemon 'Sour Grapes'

Persicaria amplexicaulis 'Blackfield'

Persicaria amplexicaulis 'Alba'

Persicaria amplexicaulis 'Speciosa'