20 favorite perennial flowers
These unfussy, long-lived plants pump out beautiful foliage and flowers year after year. Plant in fall or spring when cooler temperatures help them get a healthy start
, Kathleen N. Brenzel
Catmint (Nepeta x faassenii)Loose spikes of lavender-blue flowers cover the soft, silvery-green mounds in late spring and early summer.
As soon as blossoms fade, shear plants back by half, or cut faded flower stems to the ground to encourage rebloom.
Plants (to 1 foot tall) make attractive, informal hedges.
How to grow catmint