6-pack Catnip Nepeta 'Walker's Low' Purple-Blue - Hardy plantViolet blue flowers with grey green hairy leaves. The catnip 'Walker's Low' (Nepeta faassenii) can grow up to 40 cm high. And it really covers the ground. Butterflies and bees also love the catnip's scented flowers. You can plant this hardy perennial all year round. The flowers bloom in the summer. For full effect, plant seven plants per linear metre. Place it in a spot in the sun and water it more during dry spells. Gorgeous flowers and a wonderful