A. Cushion spurge (Euphorbia epithymoides); all zones (12 plants).

B. Lamb's ears (Stachys byzantina 'Silver Carpet'); all zones (5).

C. Santa Barbara daisy (Erigeron karvinskianus); zones 8-9, 13-24 (4).

D. Fountain grass (Pennisetum alopecuroides); opt for the less invasive purple variety; zones 3, 7-9, 11, 13-24 (9).

E. Fernleaf yarrow (Achillea filipendulina 'Coronation Gold'); all zones (2).

F. Butterfly weed (Asclepias tuberosa); all zones (7).

G. Yarrow 'Moonshine'; all zones (7).

H. Russian sage (Perovskia 'Blue Spire'); zones 2-24 (6).

I. Cupid's dart (Catananche caerulea); all zones (2).

J. Border penstemon (P. gloxinioides 'Apple Blossom'); all zones (3).

K. Cranesbill (Geranium endressii 'Wargrave Pink'); zones 1-3, 7-9, 14-24 (1).

L. Coreopsis lanceolata 'Goldfink'; all zones (2).

M. Tree mallow (Lavatera thuringiaca 'Barnsley'); zones 8-9, 14-24 (2).

N. Purple coneflower (Echinacea purpurea 'Bright Star'); all zones (1).

O. Gayfeather (Liatris spicata 'Kobold'); zones 1-3, 7-9, 14-24 (6).