Colourful mixed herbaceous border at Oxburgh Hall, Norfolk UK. By the path are clumps of purple Catmint, also known as Nepeta Racemosa or Walker's Low Stock Photo - Alamy
Nepeta racemosa 'Walkers Low' | Lambley Nursery
Good Companion Plants for Catmint - Girl Who Travels the World
Catmint (Nepeta x faassenii 'Walker's Low') in the Catmints Database - Garden.org
Catmint — A “Must-Have” Perennial | Piedmont Master Gardeners
Nepeta Walker's Low - White Flower Farm's blog
Nepeta x faassenii Walker's Low Catmint from Pleasant Run Nursery
Nepeta 'Walkers Low' – BloomBox
Walker's Low' Catmint - Fedco Trees
Walker's Low catmint named perennial of year | Mississippi State University Extension Service
Nepeta: The Perfectly Behaved Perennial
6 Beautiful Low-Water Plant Combinations | Green Industry Pros
Better Together: Baptisias
Catmint Full Growing Guide (Plant, Grow, and Care) - Gardening
Good Companion Plants for Catmint - Girl Who Travels the World